diff --git a/build.gradle b/build.gradle
index 6c08a49..d024006 100644
--- a/build.gradle
+++ b/build.gradle
@@ -55,6 +55,11 @@ dependencies {
 	// pdfbox
 	implementation 'org.apache.pdfbox:pdfbox:2.0.30'
 
+	// json 파싱
+	implementation 'com.fasterxml.jackson.core:jackson-databind:2.15.2'
+
+	// MockMultipartFile 사용을 위한 의존성 추가
+	implementation 'org.springframework.boot:spring-boot-starter-test'
 
 	// lombok
 	compileOnly 'org.projectlombok:lombok'
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/entity/Document.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/entity/Document.java
index 49f564f..f1599d0 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/document/entity/Document.java
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/entity/Document.java
@@ -47,11 +47,16 @@ public class Document extends BaseEntity {
     @Column(name = "document_url", nullable = false)
     private String documentUrl;
 
-    public static Document toEntity(DocumentType documentType, String imageUrl, String documentUrl, Form form, User user){
+    public void modifyDocument(String documentImageUrl, String documentUrl) {
+        this.documentImageUrl = documentImageUrl;
+        this.documentUrl = documentUrl;
+    }
+
+    public static Document toEntity(DocumentType documentType, String imageUrl, String documentUrl, Form form, String fileName, User user){
         return Document.builder()
                 .user(user)
                 .form(form)
-                .documentName(form.getName()) // 양식 이름과 동일하게 사용
+                .documentName(fileName) // 양식 이름과 동일하게 사용
                 .documentImageUrl(imageUrl) // 작성된 문서 이미지 형태
                 .documentUrl(documentUrl) // pdf 형태
                 .documentType(documentType)
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentService.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentService.java
index b29b920..3fdead6 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentService.java
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentService.java
@@ -2,6 +2,8 @@
 
 import Sprout_Squad.EyeOn.domain.document.web.dto.*;
 import Sprout_Squad.EyeOn.global.auth.jwt.UserPrincipal;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
 import java.util.List;
@@ -11,4 +13,8 @@ public interface DocumentService {
     List<GetDocumentRes> getAllDocuments(UserPrincipal userPrincipal);
     GetSummaryRes getSummary(UserPrincipal userPrincipal, Long id);
     WriteDocsRes writeDocument(UserPrincipal userPrincipal, Long formId, List<WriteDocsReq> writeDocsReqList) throws IOException;
+    UploadDocumentRes uploadDocument(UserPrincipal userPrincipal, MultipartFile file) throws IOException;
+    WriteDocsRes rewriteDocument(UserPrincipal userPrincipal, Long documentId, ModifyDocumentReqWrapper modifyDocumentReqWrapper) throws IOException;
+    List<GetAdviceRes> getAdvice(UserPrincipal userPrincipal, Long id) throws IOException;
+
 }
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentServiceImpl.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentServiceImpl.java
index 467f101..0fdb1b7 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentServiceImpl.java
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/service/DocumentServiceImpl.java
@@ -10,15 +10,27 @@
 import Sprout_Squad.EyeOn.domain.user.repository.UserRepository;
 import Sprout_Squad.EyeOn.global.auth.exception.CanNotAccessException;
 import Sprout_Squad.EyeOn.global.auth.jwt.UserPrincipal;
+import Sprout_Squad.EyeOn.global.converter.ImgConverter;
+import Sprout_Squad.EyeOn.global.external.exception.UnsupportedFileTypeException;
 import Sprout_Squad.EyeOn.global.external.service.OpenAiService;
 import Sprout_Squad.EyeOn.global.external.service.PdfService;
 import Sprout_Squad.EyeOn.global.external.service.S3Service;
+import Sprout_Squad.EyeOn.global.flask.dto.GetFieldForModifyRes;
+import Sprout_Squad.EyeOn.global.flask.dto.GetModelResForModify;
+import Sprout_Squad.EyeOn.global.flask.mapper.FieldLabelMapper;
+import Sprout_Squad.EyeOn.global.flask.service.FlaskService;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.RequiredArgsConstructor;
+import org.springframework.mock.web.MockMultipartFile;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
+import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.util.List;
+import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
@@ -29,6 +41,8 @@ public class DocumentServiceImpl implements DocumentService {
     private final OpenAiService openAiService;
     private final PdfService pdfService;
     private final FormRepository formRepository;
+    private final FlaskService flaskService;
+    private final FieldLabelMapper fieldLabelMapper;
 
     /**
      * 사용자의 문서 하나 상세 조회
@@ -112,15 +126,145 @@ public WriteDocsRes writeDocument(UserPrincipal userPrincipal, Long formId, List
 
         // S3에 pdf 업로드
         String fileName = s3Service.generatePdfFileName();
+        int dotIndex = fileName.lastIndexOf('.');
+        String nameOnly = (dotIndex != -1) ? fileName.substring(0, dotIndex) : fileName;
         String pdfUrl = s3Service.uploadPdfBytes(fileName, imgToPdf);
 
         DocumentType documentType = DocumentType.valueOf(form.getFormType().name());
 
-        Document document = Document.toEntity(documentType, imgUrl, pdfUrl, form, user);
+        Document document = Document.toEntity(documentType, imgUrl, pdfUrl, form, nameOnly, user);
         documentRepository.save(document);
 
         return WriteDocsRes.from(document);
+    }
+
+    /**
+     * 문서 업로드
+     */
+    @Override
+    @Transactional
+    public UploadDocumentRes uploadDocument(UserPrincipal userPrincipal, MultipartFile file) throws IOException {
+        // 사용자가 존재하지 않을 경우 -> UserNotFoundException
+        User user = userRepository.getUserById(userPrincipal.getId());
+
+        String extension = pdfService.getFileExtension(file.getOriginalFilename()).toLowerCase();
+
+        String fileUrl;
+        String fileName;
+
+        if (extension.equals("pdf")) {
+            // PDF -> 이미지 변환
+            byte[] pdfBytes = file.getBytes();
+            fileUrl = pdfService.convertPdfToImage(pdfBytes);
+            fileName = s3Service.extractKeyFromUrl(fileUrl); // 변환된 이미지의 S3 key
+        } else if (extension.equals("jpg") || extension.equals("jpeg") || extension.equals("png")) {
+            fileName = s3Service.generateFileName(file);
+            fileUrl = s3Service.uploadFile(fileName, file);
+        } else {
+            throw new UnsupportedFileTypeException();
+        }
+
+        // 플라스크 서버와 통신하여 파일 유형 받아옴
+        DocumentType documentType = DocumentType.from(flaskService.detectType(file, fileName));
+
+        Document document = Document.toEntity(documentType, fileUrl, fileUrl, null, fileName, user);
+        documentRepository.save(document);
+        return UploadDocumentRes.of(document, s3Service.getSize(fileUrl));
+    }
+
+    /**
+     * 문서 수정
+     */
+    @Override
+    @Transactional
+    public WriteDocsRes rewriteDocument(UserPrincipal userPrincipal, Long documentId,
+                                        ModifyDocumentReqWrapper modifyDocumentReqWrapper) throws IOException {
+        // 사용자가 존재하지 않을 경우 -> UserNotFoundException
+        User user = userRepository.getUserById(userPrincipal.getId());
+
+        // 문서가 존재하지 않을 경우 -> DocumentNotFoundException
+        Document document = documentRepository.getDocumentsByDocumentId(documentId);
+
+        // 사용자의 문서가 아닐 경우 -> CanNotAccessException
+        if(document.getUser() != user) throw new CanNotAccessException();
+
+        // 실제 문서를 가져옴
+        InputStream file = s3Service.downloadFile(document.getDocumentImageUrl());
+
+        // InputStream을 MultipartFile로 변환
+        MultipartFile multipartFile = new MockMultipartFile(
+                document.getDocumentName(),
+                document.getDocumentName(),
+                "application/octet-stream",
+                file
+        );
+
+
+        String fileExt = pdfService.getFileExtension(multipartFile.getOriginalFilename());
+
+        // 모델로부터 작성된 문서의 OCR 및 라벨링 결과를 가져옴
+        String res = flaskService.getModifyLabelReq(ImgConverter.toBase64(multipartFile), fileExt);
+
+        // 수정 요청과 비교하여 WritDocsReqList 구성
+        WriteDocsReqWrapper writeDocsReqList = flaskService.getModifyRes(res, modifyDocumentReqWrapper);
+
+        // 이미지 url (이미지 덮어쓰기 및 재작성)
+        String imgUrl = pdfService.rewriteImg(document.getDocumentImageUrl(), writeDocsReqList.data());
+
+        // pdf
+        byte[] imgToPdf = pdfService.convertImageToPdf(s3Service.downloadFile(imgUrl));
+
+        // S3에 pdf 업로드
+        String fileName = s3Service.generatePdfFileName();
+        String pdfUrl = s3Service.uploadPdfBytes(fileName, imgToPdf);
+
+        document.modifyDocument(imgUrl, pdfUrl);
+        return WriteDocsRes.from(document);
+    }
+
+    /**
+     * 문서 조언
+     */
+    @Override
+    public List<GetAdviceRes> getAdvice(UserPrincipal userPrincipal, Long id) throws IOException {
+        // 사용자가 존재하지 않을 경우 -> UserNotFoundException
+        User user = userRepository.getUserById(userPrincipal.getId());
+
+        // 문서가 존재하지 않을 경우 ->  DocumentNotFoundException
+        Document document = documentRepository.getDocumentsByDocumentId(id);
+
+        // 사용자의 문서가 아닐 경우 -> CanNotAccessException
+        if(document.getUser() != user) throw new CanNotAccessException();
+        InputStream file = s3Service.downloadFile(document.getDocumentImageUrl());
+
+        MultipartFile multipartFile = new MockMultipartFile(
+                document.getDocumentName(),
+                document.getDocumentName(),
+                "application/octet-stream",
+                file
+        );
+
+        GetModelResForModify getModelResForModify = flaskService.getResFromModelForModify(multipartFile, document.getDocumentName());
+
+        // 가공하기 좋은 형태로 변환
+        List<GetFieldForModifyRes> getFieldForModifyResList = flaskService.getFieldForModify(getModelResForModify);
+        System.out.println("반환: " + getFieldForModifyResList);
+
+        // GetFieldForModifyRes → GetAdviceReq로 변환
+        List<GetAdviceReq> adviceReqList = getFieldForModifyResList.stream()
+                .map(field -> new GetAdviceReq(
+                        field.index(),         // i: index
+                        field.displayName(),   // d: displayName
+                        field.value()          // v: value
+                ))
+                .collect(Collectors.toList());
+
+        System.out.println("reqList" + adviceReqList);
+        String result = openAiService.getModifyAnalyzeFromOpenAi(adviceReqList, document.getDocumentType());
 
+        ObjectMapper objectMapper = new ObjectMapper();
+        // JSON 배열의 각 요소를 GetAdviceRes 객체로 변환하여 리스트로 모음
+        return objectMapper.readValue(result, new TypeReference<List<GetAdviceRes>>() {});
     }
 
 
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/web/controller/DocumentController.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/controller/DocumentController.java
index ada939a..a431d4b 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/document/web/controller/DocumentController.java
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/controller/DocumentController.java
@@ -1,16 +1,17 @@
 package Sprout_Squad.EyeOn.domain.document.web.controller;
 
 import Sprout_Squad.EyeOn.domain.document.service.DocumentService;
-import Sprout_Squad.EyeOn.domain.document.web.dto.GetDocumentRes;
-import Sprout_Squad.EyeOn.domain.document.web.dto.GetSummaryRes;
-import Sprout_Squad.EyeOn.domain.document.web.dto.WriteDocsRes;
-import Sprout_Squad.EyeOn.domain.document.web.dto.WriteDocsReqWrapper;
+import Sprout_Squad.EyeOn.domain.document.web.dto.*;
 import Sprout_Squad.EyeOn.global.auth.jwt.UserPrincipal;
+import Sprout_Squad.EyeOn.global.external.service.PdfService;
+import Sprout_Squad.EyeOn.global.external.service.S3Service;
+import Sprout_Squad.EyeOn.global.flask.service.FlaskService;
 import Sprout_Squad.EyeOn.global.response.SuccessResponse;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
 import java.util.List;
@@ -20,7 +21,19 @@
 @RequestMapping("/api/document")
 public class DocumentController {
     private final DocumentService documentService;
+    private final FlaskService flaskService;
+    private final PdfService pdfService;
+    private final S3Service s3Service;
 
+    // 문서 업로드
+    @PostMapping
+    public ResponseEntity<SuccessResponse<UploadDocumentRes>> uploadDocument(
+            @AuthenticationPrincipal UserPrincipal userPrincipal, @RequestPart("file") MultipartFile file) throws IOException {
+        UploadDocumentRes uploadDocumentRes = documentService.uploadDocument(userPrincipal, file);
+        return ResponseEntity.ok(SuccessResponse.from(uploadDocumentRes));
+    }
+
+    // 문서 상세 조회
     @GetMapping("/{documentId}/detail")
     public ResponseEntity<SuccessResponse<GetDocumentRes>> getDocumentDetail(
             @AuthenticationPrincipal UserPrincipal userPrincipal, @PathVariable Long documentId) {
@@ -28,6 +41,7 @@ public ResponseEntity<SuccessResponse<GetDocumentRes>> getDocumentDetail(
         return ResponseEntity.ok(SuccessResponse.from(getDocumentRes));
     }
 
+    // 문서 리스트 조회
     @GetMapping("/list")
     public ResponseEntity<SuccessResponse<List<GetDocumentRes>>> getDocumentList(
             @AuthenticationPrincipal UserPrincipal userPrincipal) {
@@ -35,6 +49,7 @@ public ResponseEntity<SuccessResponse<List<GetDocumentRes>>> getDocumentList(
         return ResponseEntity.ok(SuccessResponse.from(getDocumentResList));
     }
 
+    // 문서 요약
     @GetMapping("/{documentId}/summary")
     public ResponseEntity<SuccessResponse<GetSummaryRes>> getDocumentSummary(
             @AuthenticationPrincipal UserPrincipal userPrincipal, @PathVariable Long documentId){
@@ -42,6 +57,7 @@ public ResponseEntity<SuccessResponse<GetSummaryRes>> getDocumentSummary(
         return ResponseEntity.ok(SuccessResponse.from(getSummaryRes));
     }
 
+    // 문서 작성
     @PostMapping("/{formId}/write")
     public ResponseEntity<SuccessResponse<WriteDocsRes>> writeDocument(
             @AuthenticationPrincipal UserPrincipal userPrincipal,
@@ -49,4 +65,21 @@ public ResponseEntity<SuccessResponse<WriteDocsRes>> writeDocument(
         WriteDocsRes writeDocsRes = documentService.writeDocument(userPrincipal, formId, writeDocsReqWrapper.data());
         return ResponseEntity.ok(SuccessResponse.from(writeDocsRes));
     }
+
+    // 문서 수정
+    @PutMapping("/{documentId}")
+    public ResponseEntity<SuccessResponse<WriteDocsRes>> rewriteDocument(
+            @AuthenticationPrincipal UserPrincipal userPrincipal,
+            @PathVariable Long documentId, @RequestBody ModifyDocumentReqWrapper modifyDocumentReqWrapper) throws IOException {
+        WriteDocsRes writeDocsRes = documentService.rewriteDocument(userPrincipal, documentId, modifyDocumentReqWrapper);
+        return ResponseEntity.ok(SuccessResponse.from(writeDocsRes));
+    }
+
+    // 문서 조언
+    @GetMapping("/{documentId}/advice")
+    public ResponseEntity<SuccessResponse<?>> getDocumentAdvice(
+            @AuthenticationPrincipal UserPrincipal userPrincipal, @PathVariable Long documentId) throws IOException {
+        List<GetAdviceRes> getAdviceResList=documentService.getAdvice(userPrincipal, documentId);
+        return ResponseEntity.ok(SuccessResponse.from(getAdviceResList));
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/GetAdviceReq.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/GetAdviceReq.java
new file mode 100644
index 0000000..a66767b
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/GetAdviceReq.java
@@ -0,0 +1,8 @@
+package Sprout_Squad.EyeOn.domain.document.web.dto;
+
+public record GetAdviceReq(
+        int i, // index
+        String d, // displayName
+        String v // value
+) {
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/GetAdviceRes.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/GetAdviceRes.java
new file mode 100644
index 0000000..a4dde64
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/GetAdviceRes.java
@@ -0,0 +1,9 @@
+package Sprout_Squad.EyeOn.domain.document.web.dto;
+
+public record GetAdviceRes(
+        int i, // index
+        String d, // displayName
+        String v, // value
+        String a // advice
+) {
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/ModifyDocumentReq.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/ModifyDocumentReq.java
new file mode 100644
index 0000000..1d9179b
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/ModifyDocumentReq.java
@@ -0,0 +1,7 @@
+package Sprout_Squad.EyeOn.domain.document.web.dto;
+
+public record ModifyDocumentReq(
+        int i, // index
+        String v // value
+) {
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/ModifyDocumentReqWrapper.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/ModifyDocumentReqWrapper.java
new file mode 100644
index 0000000..a8cfa3a
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/ModifyDocumentReqWrapper.java
@@ -0,0 +1,8 @@
+package Sprout_Squad.EyeOn.domain.document.web.dto;
+
+import java.util.List;
+
+public record ModifyDocumentReqWrapper(
+        List<ModifyDocumentReq> data
+) {
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/UploadDocumentRes.java b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/UploadDocumentRes.java
new file mode 100644
index 0000000..658c04d
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/document/web/dto/UploadDocumentRes.java
@@ -0,0 +1,14 @@
+package Sprout_Squad.EyeOn.domain.document.web.dto;
+
+import Sprout_Squad.EyeOn.domain.document.entity.Document;
+
+public record UploadDocumentRes(
+        Long documentId,
+        String name,
+        long documentSize,
+        String documentUrl
+) {
+    public static UploadDocumentRes of(Document document, long size) {
+        return new UploadDocumentRes(document.getId(), document.getDocumentName(), size, document.getDocumentUrl());
+    }
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormService.java b/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormService.java
index 23e23c7..bda23e7 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormService.java
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormService.java
@@ -3,6 +3,7 @@
 import Sprout_Squad.EyeOn.domain.form.entity.enums.FormType;
 import Sprout_Squad.EyeOn.domain.form.web.dto.*;
 import Sprout_Squad.EyeOn.global.auth.jwt.UserPrincipal;
+import Sprout_Squad.EyeOn.global.flask.dto.GetModelRes;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
@@ -13,6 +14,4 @@ public interface FormService {
     GetFormRes getOneForm(UserPrincipal userPrincipal, Long formId);
     List<GetFormRes> getAllFormsByType(UserPrincipal userPrincipal, FormType formType);
     FormType getFormType(MultipartFile file, String fileName);
-    GetModelRes getResFromModel(MultipartFile file, String fileName);
-    List<GetFieldRes> getField(GetModelRes getModelRes, UserPrincipal userPrincipal);
 }
\ No newline at end of file
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormServiceImpl.java b/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormServiceImpl.java
index 3320aa0..c58094d 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormServiceImpl.java
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/form/service/FormServiceImpl.java
@@ -8,28 +8,17 @@
 import Sprout_Squad.EyeOn.domain.user.repository.UserRepository;
 import Sprout_Squad.EyeOn.global.auth.exception.CanNotAccessException;
 import Sprout_Squad.EyeOn.global.auth.jwt.UserPrincipal;
-import Sprout_Squad.EyeOn.global.converter.ImgConverter;
-import Sprout_Squad.EyeOn.global.flask.exception.GetLabelFailedException;
-import Sprout_Squad.EyeOn.global.flask.exception.TypeDetectedFiledException;
-import Sprout_Squad.EyeOn.global.flask.mapper.FieldLabelMapper;
 import Sprout_Squad.EyeOn.global.flask.service.FlaskService;
 import Sprout_Squad.EyeOn.global.external.exception.UnsupportedFileTypeException;
 import Sprout_Squad.EyeOn.global.external.service.PdfService;
 import Sprout_Squad.EyeOn.global.external.service.S3Service;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 
-import javax.imageio.ImageIO;
-import java.awt.image.BufferedImage;
-import java.io.ByteArrayOutputStream;
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
-import java.util.Map;
 
 @Service
 @RequiredArgsConstructor
@@ -39,128 +28,14 @@ public class FormServiceImpl implements FormService {
     private final S3Service s3Service;
     private final PdfService pdfService;
     private final FlaskService flaskService;
-    private final FieldLabelMapper fieldLabelMapper;
 
     /**
      * 양식 판별
      */
     @Override
     public FormType getFormType(MultipartFile file, String fileName) {
-        try {
-            String fileToBase64 = ImgConverter.toBase64(file);
-
-            String fileExtension = pdfService.getFileExtension(fileName);
-            String type = flaskService.detectType(fileToBase64, fileExtension);
-
-            return FormType.from(type);
-
-        } catch (Exception e){ throw new TypeDetectedFiledException(); }
-    }
-
-    /**
-     * 양식 필드 분석
-     */
-    @Override
-    public GetModelRes getResFromModel(MultipartFile file, String fileName){
-        try {
-            String fileToBase64 = ImgConverter.toBase64(file);
-            String fileExtension = pdfService.getFileExtension(fileName);
-
-            // 플라스크 요청
-            String jsonRes = flaskService.getLabel(fileToBase64, fileExtension);
-
-            // jsonRes를 파싱
-            ObjectMapper mapper = new ObjectMapper();
-            Map<String, Object> resultMap = mapper.readValue(jsonRes, Map.class);
-
-            // tokens: 문서에서 추출된 텍스트 조각
-            List<String> tokens = (List<String>) resultMap.get("tokens");
-//            System.out.println("문서 tokens: "+ tokens);
-
-            // labels: 각 토큰의 labels
-            List<String> labels = (List<String>) resultMap.get("labels");
-//            System.out.println("문서 labels: "+labels);
-
-            // doctype: 문서 유형
-            String doctype = (String) resultMap.get("doctype");
-
-            // rawBboxes: 각 토큰의 bounding box 좌표 정보
-            List<List<?>> rawBboxes = (List<List<?>>) resultMap.get("bboxes");
-
-            // bboxes: 각 토큰의 bounding box 좌표 정보
-            List<List<Double>> bboxes = new ArrayList<>();
-
-            // List<?> 형태로 파싱된 좌표 데이터를 List<Double>로 변환
-            for (List<?> box : rawBboxes) {
-                List<Double> convertedBox = box.stream()
-                        .map(val -> ((Number) val).doubleValue()) // JSON 파싱 결과가 Number 타입 -> 형변환 필요
-                        .toList();
-                bboxes.add(convertedBox);
-            }
-            return GetModelRes.of(doctype, tokens, bboxes, labels);
-        } catch (Exception e){ throw new GetLabelFailedException();}
-
-    }
-
-    /**
-     * db에 있는 정보를 채워서 반환
-     */
-    public List<GetFieldRes> getField(GetModelRes getModelRes, UserPrincipal userPrincipal){
-//        System.out.println("GetModelRes: " +getModelRes);
-
-        // 사용자가 존재하지 않을 경우 -> UserNotFoundException
-        User user = userRepository.getUserById(userPrincipal.getId());
-
-        List<String> tokens = getModelRes.tokens();
-        List<String> labels = getModelRes.labels();
-        List<List<Double>> bboxes = getModelRes.bboxes();
-
-        String docType = getModelRes.doctype();
-
-        List<GetFieldRes> userInputs = new ArrayList<>();
-
-        // context별 전체 label map 불러오기
-        Map<String, Map<String, String>> contextLabelMap = fieldLabelMapper.getContextualLabels();
-
-        // 현재 문서 타입에 해당하는 label 맵
-        Map<String, String> labelMap = contextLabelMap.getOrDefault(docType, Collections.emptyMap());
-        Map<String, String> commonMap = contextLabelMap.getOrDefault("common", Collections.emptyMap());
-
-        for (int i = 0; i < tokens.size(); i++) {
-            if ("[BLANK]".equals(tokens.get(i))) {
-                String label = labels.get(i);
-
-                if (label.endsWith("-FIELD")) { // label이 -FIELD 로 끝나면
-                    String baseLabel = label.replace("-FIELD", "");
-
-                    // displayName 우선순위: 1) 문서 타입 별 Map → 2) 공통 Map → 3) 기본값
-                    String displayName = labelMap.getOrDefault(baseLabel,
-                            commonMap.getOrDefault(baseLabel, baseLabel));
-
-                    // 사용자 정보에서 가져올 수 있는 값 매핑
-                    String value = switch (baseLabel) {
-                        case "B-PERSONAL-NAME", "B-GRANTOR-NAME", "B-DELEGATE-NAME", "B-NAME", "B-SIGN-NAME" -> user.getName();
-                        case "B-PERSONAL-RRN", "B-GRANTOR-RRN", "B-DELEGATE-RRN" -> user.getResidentNumber();
-                        case "B-PERSONAL-PHONE", "B-GRANTOR-PHONE", "B-DELEGATE-PHONE" -> user.getPhoneNumber();
-                        case "B-PERSONAL-ADDR", "B-GRANTOR-ADDR", "B-DELEGATE-ADDR" -> user.getAddress();
-                        case "B-PERSONAL-EMAIL" -> user.getEmail();
-                        default -> null; // 나머지는 프론트로부터 값 받기
-                    };
-
-                    List<Double> bbox = bboxes.get(i);
-
-                    userInputs.add(new GetFieldRes(
-                            baseLabel,
-                            label,
-                            i,
-                            bbox,
-                            displayName,
-                            value
-                    ));
-                }
-            }
-        }
-        return userInputs;
+        String type = flaskService.detectType(file, fileName);
+        return FormType.from(type);
     }
 
     /**
@@ -177,7 +52,6 @@ public UploadFormRes uploadForm(UserPrincipal userPrincipal, MultipartFile file)
         String fileUrl;
         String fileName;
 
-//        System.out.println("파일 확장자 : " + extension);
         if (extension.equals("pdf")) {
             // PDF -> 이미지 변환
             byte[] pdfBytes = file.getBytes();
@@ -191,9 +65,6 @@ public UploadFormRes uploadForm(UserPrincipal userPrincipal, MultipartFile file)
             throw new UnsupportedFileTypeException();
         }
 
-//        System.out.println("fileName : " + fileName);
-//        System.out.println("fileUrl : " + fileUrl);
-
         // 플라스크 서버와 통신하여 파일 유형 받아옴
         FormType formType = getFormType(file, fileName);
 
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/form/web/controller/FormController.java b/src/main/java/Sprout_Squad/EyeOn/domain/form/web/controller/FormController.java
index 4953463..2dd8e7b 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/form/web/controller/FormController.java
+++ b/src/main/java/Sprout_Squad/EyeOn/domain/form/web/controller/FormController.java
@@ -2,11 +2,12 @@
 
 import Sprout_Squad.EyeOn.domain.form.entity.enums.FormType;
 import Sprout_Squad.EyeOn.domain.form.service.FormService;
-import Sprout_Squad.EyeOn.domain.form.web.dto.GetFieldRes;
-import Sprout_Squad.EyeOn.domain.form.web.dto.GetModelRes;
+import Sprout_Squad.EyeOn.global.flask.dto.GetFieldForWriteRes;
+import Sprout_Squad.EyeOn.global.flask.dto.GetModelRes;
 import Sprout_Squad.EyeOn.domain.form.web.dto.GetFormRes;
 import Sprout_Squad.EyeOn.domain.form.web.dto.UploadFormRes;
 import Sprout_Squad.EyeOn.global.auth.jwt.UserPrincipal;
+import Sprout_Squad.EyeOn.global.flask.service.FlaskService;
 import Sprout_Squad.EyeOn.global.response.SuccessResponse;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
@@ -22,6 +23,7 @@
 @RequestMapping("/api/form")
 public class FormController {
     private final FormService formService;
+    private final FlaskService flaskService;
 
     @PostMapping
     public ResponseEntity<SuccessResponse<UploadFormRes>> uploadForm(@AuthenticationPrincipal UserPrincipal userPrincipal,
@@ -31,15 +33,14 @@ public ResponseEntity<SuccessResponse<UploadFormRes>> uploadForm(@Authentication
     }
 
     @PostMapping("/analyze/field")
-    public ResponseEntity<SuccessResponse<List<GetFieldRes>>> getFormField(@AuthenticationPrincipal UserPrincipal userPrincipal,
-                                                                           @RequestPart("file") MultipartFile file) {
+    public ResponseEntity<SuccessResponse<List<GetFieldForWriteRes>>> getFormField(@AuthenticationPrincipal UserPrincipal userPrincipal,
+                                                                                   @RequestPart("file") MultipartFile file) {
         String fileName = file.getOriginalFilename();
 
-        GetModelRes getModelRes = formService.getResFromModel(file, fileName);
-        System.out.println("1차 통과 : " + getModelRes);
-        List<GetFieldRes> getFieldResList = formService.getField(getModelRes, userPrincipal);
+        GetModelRes getModelRes = flaskService.getResFromModelForWrite(file, fileName);
+        List<GetFieldForWriteRes> getFieldForWriteResList = flaskService.getFieldForWrite(getModelRes, userPrincipal);
 
-        return ResponseEntity.ok(SuccessResponse.from(getFieldResList));
+        return ResponseEntity.ok(SuccessResponse.from(getFieldForWriteResList));
     }
 
     @GetMapping("/{formId}/detail")
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/form/web/dto/GetModelRes.java b/src/main/java/Sprout_Squad/EyeOn/domain/form/web/dto/GetModelRes.java
deleted file mode 100644
index b26f6fc..0000000
--- a/src/main/java/Sprout_Squad/EyeOn/domain/form/web/dto/GetModelRes.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package Sprout_Squad.EyeOn.domain.form.web.dto;
-
-import java.util.List;
-
-public record GetModelRes(
-        String doctype,
-        List<String> tokens,
-        List<List<Double>> bboxes,
-        List<String> labels
-) {
-    public static GetModelRes of(String doctype, List<String> tokens, List<List<Double>> bboxes, List<String> labels) {
-        return new GetModelRes(doctype, tokens, bboxes, labels);
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/exception/GlobalExceptionHandler.java b/src/main/java/Sprout_Squad/EyeOn/global/exception/GlobalExceptionHandler.java
index 7d0b5a4..4ddc7ef 100644
--- a/src/main/java/Sprout_Squad/EyeOn/global/exception/GlobalExceptionHandler.java
+++ b/src/main/java/Sprout_Squad/EyeOn/global/exception/GlobalExceptionHandler.java
@@ -13,6 +13,7 @@
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 import org.springframework.web.method.annotation.MethodArgumentTypeMismatchException;
+import org.springframework.web.multipart.support.MissingServletRequestPartException;
 
 @RestControllerAdvice
 @Slf4j
@@ -84,6 +85,17 @@ private ResponseEntity<ErrorResponse> handleUserSignupRequiredException(SignupRe
         return ResponseEntity.status(error.getHttpStatus()).body(error);
     }
 
+    /* RequestPart 누락 시 에러 처리 */
+    @ExceptionHandler(MissingServletRequestPartException.class)
+    private ResponseEntity<ErrorResponse> handleMissingServletRequestPartException(MissingServletRequestPartException e) {
+        log.error("MissingServletRequestPartException Error: {}", e.getRequestPartName());
+        ErrorResponse error = ErrorResponse.of(
+                GlobalErrorCode.BAD_REQUEST_ERROR,
+                e.getRequestPartName() + " 파트가 요청에 없습니다."
+        );
+        return ResponseEntity.status(error.getHttpStatus()).body(error);
+    }
+
 
     /* 나머지 예외 처리 */
     @ExceptionHandler(Exception.class)
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/external/service/OpenAiService.java b/src/main/java/Sprout_Squad/EyeOn/global/external/service/OpenAiService.java
index 24d5277..a8cc403 100644
--- a/src/main/java/Sprout_Squad/EyeOn/global/external/service/OpenAiService.java
+++ b/src/main/java/Sprout_Squad/EyeOn/global/external/service/OpenAiService.java
@@ -1,12 +1,19 @@
 package Sprout_Squad.EyeOn.global.external.service;
 
+import Sprout_Squad.EyeOn.domain.document.entity.enums.DocumentType;
+import Sprout_Squad.EyeOn.domain.document.web.dto.GetAdviceReq;
 import Sprout_Squad.EyeOn.global.config.OpenAiConfig;
 import Sprout_Squad.EyeOn.global.external.exception.OpenAiApiException;
+import Sprout_Squad.EyeOn.global.flask.dto.GetModelRes;
+import Sprout_Squad.EyeOn.global.flask.mapper.FieldLabelMapper;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.*;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestTemplate;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 
@@ -15,26 +22,79 @@
 public class OpenAiService {
     private final OpenAiConfig openAiConfig;
     private final RestTemplate restTemplate;
+    private final FieldLabelMapper fieldLabelMapper;
 
     private static final String CHAT_URL = "https://api.openai.com/v1/chat/completions";
     private static final String SUMMARY_PROMPT = "당신은 문서를 요약하는 능력이 아주 뛰어난 사람입니다."
             + "사진의 문서를 분석하고, 중요한 내용을 빠짐없이 요약해주세요. 반드시 모든 내용을 요약에 포함시켜주어야 합니다."
             + "텍스트로 제공할 것이기 때문에 강조 표시나 볼드 표시는 필요하지 않습니다.";
 
+    private static final String MODIFY_PROMPT = "당신은 문서를 검토하는 능력이 매우 뛰어난 사람입니다. 해당 문서를 검토하세요"+
+            "모든 항목을 분석할 필요는 없으며, 오타를 찾거나 잘못된 부분 지적하세요"+ "다음 JSON 배열은 문서를 구조화 시킨 내용입니다. " +
+            "각 항목은 index(i), displayName(d:표시된 명칭), value(v:입력된 값)를 가지고 있습니다.\n" +
+            "법적으로 살펴봐야 할 조언이나 문제가 될만할 부분을 간단하게 제시하세요." +
+            "수정이 필요한 항목에 한해서만 대해 한국어 조언(a)를 추가하여 JSON으로 반환해 주세요. 그러나 ```json이라는 표시는 빼주세요. " +
+            "조언을 제공할 항목의 d와 v값을 JSON 형태로 제공할 때 표시된 그대로가 아닌 알맞은 띄어쓰기를 제공해주세요. " +
+            "그러나 이 내용이 a에 들어가서는 안됩니다. \n" +
+            "형식은 아래와 같아야 합니다:\n" +
+            "\n" +
+            "[\n" +
+            "  { \"i\": ..., \"d\": \"...\", \"v\": \"...\", \"a\": \"...\" },\n" +
+            "  ...\n" +
+            "]\n" +
+            "\n" +
+            "설명 없이 배열만 출력하세요.\n" +
+            "입력은 다음과 같습니다. \n";
+
+    /**
+     * 수정할 부분 분석 요청
+     */
+    public String getModifyAnalyzeFromOpenAi(List<GetAdviceReq> fields, DocumentType documentType) {
+        String json;
+        try {
+            json = new ObjectMapper().writeValueAsString(fields);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException("JSON 직렬화 실패", e);
+        }
+
+        System.out.println("📝 분석 요청 payload: " + json);
+
+        String prompt = "이 문서의 유형은 " + documentType + "입니다.\n" + MODIFY_PROMPT + json;
+        Map<String, Object> requestBody = createRequestBody(prompt);
+        ResponseEntity<Map> response = sendRequest(requestBody);
+        return parseResponse(response);
+    }
+
+
     /**
      * 이미지 요약 요청
      */
     public String getSummaryFromOpenAi(String imageUrl) {
-        Map<String, Object> requestBody = createRequestBody(imageUrl, SUMMARY_PROMPT);
+        Map<String, Object> requestBody = createRequestBodyWithImg(imageUrl, SUMMARY_PROMPT);
         ResponseEntity<Map> response = sendRequest(requestBody);
         return parseResponse(response);
+    }
 
+    /**
+     * 프롬프트로만 RequestBody 생성
+     */
+    public Map<String, Object> createRequestBody(String prompt) {
+        return Map.of(
+                "model", openAiConfig.getModel(),
+                "messages", List.of(
+                        Map.of(
+                                "role", "user",
+                                "content", prompt
+                        )
+                )
+        );
     }
 
+
     /**
-     * RequestBody 생성
+     * 이미지를 포함한 RequestBody 생성
      */
-    public Map<String, Object> createRequestBody(String imageUrl, String prompt){
+    public Map<String, Object> createRequestBodyWithImg(String imageUrl, String prompt){
         return Map.of(
                 "model", openAiConfig.getModel(),
                 "messages", List.of(
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/external/service/PdfService.java b/src/main/java/Sprout_Squad/EyeOn/global/external/service/PdfService.java
index 39df36b..a8bc00b 100644
--- a/src/main/java/Sprout_Squad/EyeOn/global/external/service/PdfService.java
+++ b/src/main/java/Sprout_Squad/EyeOn/global/external/service/PdfService.java
@@ -26,6 +26,103 @@
 public class PdfService {
     private final S3Service s3Service;
 
+    /**
+     * S3 url을 받아 기존 양식 위에 적힌 부분들을 하얀색으로 덮어 씌우고 재작성하는 로직
+     */
+    public String rewriteImg(String s3ImageUrl, List<WriteDocsReq> fields) {
+        try (
+                InputStream imageStream = s3Service.downloadFile(s3ImageUrl);
+                ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        ) {
+            // 1. 이미지 불러오기
+            BufferedImage image = ImageIO.read(imageStream);
+            if (image == null) {
+                throw new IOException("이미지 로딩 실패");
+            }
+
+            // 2. 폰트 설정
+            InputStream fontStream = getClass().getClassLoader().getResourceAsStream("fonts/NanumGothic.ttf");
+            if (fontStream == null) throw new FontNotFoundException();
+            Font font = Font.createFont(Font.TRUETYPE_FONT, fontStream).deriveFont(12f);
+
+            Graphics2D g = image.createGraphics();
+            g.setFont(font);
+            g.setColor(Color.BLACK);
+
+            // 3. 텍스트 삽입
+            for (WriteDocsReq field : fields) {
+
+                if (field.value() == null) continue;
+                // bbox : [x0, y0, x1, y1]
+                List<Double> bbox = field.bbox();
+
+                float imgWidth = image.getWidth();
+                float imgHeight = image.getHeight();
+
+                // bbox 좌표를 이미지 크기에 맞게 변환
+                List<? extends Number> bboxRaw = field.bbox();
+                float x0 = bboxRaw.get(0).floatValue() * imgWidth / 1000;
+                float y0 = bboxRaw.get(1).floatValue() * imgHeight / 1000;
+                float x1 = bboxRaw.get(2).floatValue() * imgWidth / 1000;
+                float y1 = bboxRaw.get(3).floatValue() * imgHeight / 1000;
+
+                // 박스 덮기용
+                double ratioXLeft = 0.97;
+                double ratioXRight = 0.97;
+                double ratioYTop = 0.80;
+                double ratioYBottom = 0.97;
+
+                double width = x1 - x0;
+                double height = y1 - y0;
+
+                double newX0 = x0 + width * (1 - ratioXLeft);
+                double newX1 = x0 + width * ratioXRight;
+                double newY0 = y0 + height * (1 - ratioYTop);
+                double newY1 = y0 + height * ratioYBottom;
+
+                // 박스를 흰색으로 지우기
+                g.setColor(Color.WHITE);
+                g.fillRect((int)newX0, (int)newY0, (int)(newX1 - newX0), (int)(newY1 - newY0));
+
+                // 텍스트를 박스 안에 적절히 배치 (좌표 보정)
+                float boxHeight = y1 - y0;
+                x0 += 15f;
+                y0 += boxHeight * 0.75f; // 텍스트를 박스의 적절한 위치로 이동 (상단보다는 조금 아래쪽)
+
+                System.out.printf("[좌표] x0=%.2f, y0=%.2f, x1=%.2f, y1=%.2f%n", x0, y0, x1, y1);
+
+                g.setColor(Color.BLACK);
+                //g.drawRect((int) x0, (int) y0, (int) (x1 - x0), (int) boxHeight); // 디버깅용 사각형 그리기
+                // 폰트 크기를 bbox 높이에 맞춰 동적으로 설정
+                Font dynamicFont = font.deriveFont( 20f);  // 박스 높이에 맞춰 폰트 크기 조정
+                g.setFont(dynamicFont);
+
+                System.out.println("[텍스트 출력] value=\"" + field.value() + "\" at (" + x0 + ", " + y0 + ")");
+
+                // 텍스트 삽입
+                g.drawString(field.value(), x0, y0);
+            }
+
+
+            g.dispose();
+
+            System.out.println("4번");
+            // 4. BufferedImage → ByteArrayOutputStream (JPG 저장)
+            ImageIO.write(image, "png", outputStream);
+            byte[] imageBytes = outputStream.toByteArray();
+
+            System.out.println("5번");
+            // 5. S3 업로드
+            String fileName = generateImageFileName();
+            String s3Key = "filled-docs/" + fileName;
+            return s3Service.uploadImageBytes(s3Key, imageBytes);
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new FileNotCreatedException();
+        }
+    }
+
     /**
      * S3 url을 받아 양식 위에 문서 작성 로직
      */
@@ -51,11 +148,9 @@ public String fillImageFromS3(String s3ImageUrl, List<WriteDocsReq> fields) {
 
             // 3. 텍스트 삽입
             for (WriteDocsReq field : fields) {
-
                 if (field.value() == null) continue;
                 // bbox : [x0, y0, x1, y1]
                 List<Double> bbox = field.bbox();
-                System.out.println("Bounding Box for " + field.displayName() + ": " + bbox);
 
                 float imgWidth = image.getWidth();
                 float imgHeight = image.getHeight();
@@ -66,8 +161,9 @@ public String fillImageFromS3(String s3ImageUrl, List<WriteDocsReq> fields) {
                 float x1 = bbox.get(2).floatValue() * imgWidth / 1000;  // x1
                 float y1 = bbox.get(3).floatValue() * imgHeight / 1000; // y1
 
-                // 텍스트를 박스 안에 적절히 배치 (y좌표 보정)
+                // 텍스트를 박스 안에 적절히 배치 (좌표 보정)
                 float boxHeight = y1 - y0;
+                x0 += 15f;
                 y0 += boxHeight * 0.75f; // 텍스트를 박스의 적절한 위치로 이동 (상단보다는 조금 아래쪽)
 
 
@@ -156,17 +252,13 @@ public String convertPdfToImage(byte[] pdfBytes) throws IOException {
                 PDDocument document = PDDocument.load(pdfBytes);
                 ByteArrayOutputStream imageOutputStream = new ByteArrayOutputStream();
             ) {
-            System.out.println("잘 들어와요22");
             PDFRenderer renderer = new PDFRenderer(document);
 
-            System.out.println("잘 들어와요333");
             // 첫 페이지를 이미지로 변환
             BufferedImage bim = renderer.renderImageWithDPI(0, 300);
 
-            System.out.println("잘 들어와요4444");
             ImageIO.write(bim, "jpg", imageOutputStream);
             byte[] imageBytes = imageOutputStream.toByteArray();
-            System.out.println("잘 들어와요5");
 
             String fileName = generateImageFileName();
             String s3Key = "pdf-preview/" + fileName;
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetFieldForModifyRes.java b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetFieldForModifyRes.java
new file mode 100644
index 0000000..bbfeb97
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetFieldForModifyRes.java
@@ -0,0 +1,13 @@
+package Sprout_Squad.EyeOn.global.flask.dto;
+
+import java.util.List;
+
+public record GetFieldForModifyRes(
+        String field,
+        String targetField,
+        int index,
+        List<Double> bbox,
+        String displayName,
+        String value
+) {
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/domain/form/web/dto/GetFieldRes.java b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetFieldForWriteRes.java
similarity index 68%
rename from src/main/java/Sprout_Squad/EyeOn/domain/form/web/dto/GetFieldRes.java
rename to src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetFieldForWriteRes.java
index 958f880..2e16a6b 100644
--- a/src/main/java/Sprout_Squad/EyeOn/domain/form/web/dto/GetFieldRes.java
+++ b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetFieldForWriteRes.java
@@ -1,8 +1,8 @@
-package Sprout_Squad.EyeOn.domain.form.web.dto;
+package Sprout_Squad.EyeOn.global.flask.dto;
 
 import java.util.List;
 
-public record GetFieldRes(
+public record GetFieldForWriteRes(
         String field,
         String targetField,
         int index,
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetModelRes.java b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetModelRes.java
new file mode 100644
index 0000000..dbe44a9
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetModelRes.java
@@ -0,0 +1,21 @@
+package Sprout_Squad.EyeOn.global.flask.dto;
+
+import java.util.List;
+
+public record GetModelRes(
+        String doctype,
+        List<String> tokens,
+        List<List<Double>> bboxes,
+        List<String> labels,
+        List<Integer> indices // bboxes와 일대일 대응되는 인덱스
+) {
+    public static GetModelRes of(String doctype, List<String> tokens, List<List<Double>> bboxes, List<String> labels) {
+        // index 리스트 생성
+        List<Integer> indices = new java.util.ArrayList<>();
+        for (int i = 0; i < bboxes.size(); i++) {
+            indices.add(i); // bbox index 기준
+        }
+
+        return new GetModelRes(doctype, tokens, bboxes, labels, indices);
+    }
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetModelResForModify.java b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetModelResForModify.java
new file mode 100644
index 0000000..7795bf8
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/global/flask/dto/GetModelResForModify.java
@@ -0,0 +1,23 @@
+package Sprout_Squad.EyeOn.global.flask.dto;
+
+import java.util.List;
+
+public record GetModelResForModify(
+        String doctype,
+        List<String> tokens,
+        List<List<Double>> bboxes,
+        List<String> labels,
+        List<Integer> indices, // bboxes와 일대일 대응되는 인덱스
+        List<String> mergedTokens
+
+) {
+    public static GetModelResForModify of(String doctype, List<String> tokens, List<List<Double>> bboxes, List<String> labels, List<String> mergedTokens) {
+        // index 리스트 생성
+        List<Integer> indices = new java.util.ArrayList<>();
+        for (int i = 0; i < bboxes.size(); i++) {
+            indices.add(i); // bbox index 기준
+        }
+
+        return new GetModelResForModify(doctype, tokens, bboxes, labels, indices, mergedTokens);
+    }
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/flask/mapper/FieldLabelMapper.java b/src/main/java/Sprout_Squad/EyeOn/global/flask/mapper/FieldLabelMapper.java
index 6a3ba73..7a418e4 100644
--- a/src/main/java/Sprout_Squad/EyeOn/global/flask/mapper/FieldLabelMapper.java
+++ b/src/main/java/Sprout_Squad/EyeOn/global/flask/mapper/FieldLabelMapper.java
@@ -11,7 +11,7 @@ public class FieldLabelMapper {
 
     private final Map<String, Map<String, String>> labelMap;
 
-    // 🟨 클래스 필드 선언 추가
+    // 클래스 필드 선언 추가
     private final Map<String, String> resume;
     private final Map<String, String> certificate;
     private final Map<String, String> consent;
@@ -120,15 +120,12 @@ public FieldLabelMapper() {
         );
 
         this.common = Map.ofEntries(
-                Map.entry("년", "B-SIGN-YEAR"),
-                Map.entry("월", "B-SIGN-MONTH"),
-                Map.entry("일", "B-SIGN-DAY"),
-                Map.entry("지원자", "B-SIGN-NAME"),
-                Map.entry("작성일자", "B-DATE-DOCUMENT"),
-                Map.entry("작성일", "B-DATE-DOCUMENT"),
-                Map.entry("위임자", "B-SIGN-NAME"),
-                Map.entry("(인)", "SIGN-SEAL"),
-                Map.entry("(서명)", "SIGN-SEAL")
+                Map.entry("B-SIGN-YEAR", "년"),
+                Map.entry("B-SIGN-MONTH", "월"),
+                Map.entry("B-SIGN-DAY", "일"),
+                Map.entry("B-SIGN-NAME", "지원자"),
+                Map.entry("B-DATE-DOCUMENT", "작성일자"),
+                Map.entry("B-SIGN-SEAL", "(인)")
         );
 
         tempMap.put("resume", this.resume);
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/flask/mapper/FieldTargetMapper.java b/src/main/java/Sprout_Squad/EyeOn/global/flask/mapper/FieldTargetMapper.java
new file mode 100644
index 0000000..fc14d3b
--- /dev/null
+++ b/src/main/java/Sprout_Squad/EyeOn/global/flask/mapper/FieldTargetMapper.java
@@ -0,0 +1,122 @@
+package Sprout_Squad.EyeOn.global.flask.mapper;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+public class FieldTargetMapper {
+    private static final Map<String, String> fieldToTargetField;
+
+    static {
+        Map<String, String> map = new HashMap<>();
+
+        // 이력서 - 자격
+        map.put("B-CERTIFICATE-DATE", "B-CERTIFICATE-DATE-FIELD");
+        map.put("B-CERTIFICATE-NAME", "B-CERTIFICATE-NAME-FIELD");
+        map.put("B-CERTIFICATE-ORG", "B-CERTIFICATE-ORG-FIELD");
+        map.put("B-CERTIFICATE-SCORE", "B-CERTIFICATE-SCORE-FIELD");
+
+        // 이력서 - 학업
+        map.put("B-EDU-GPA", "B-EDU-GPA-FIELD");
+        map.put("B-EDU-MAJOR", "B-EDU-MAJOR-FIELD");
+        map.put("B-EDU-NAME", "B-EDU-NAME-FIELD");
+        map.put("B-EDU-PERIOD", "B-EDU-PERIOD-FIELD");
+
+        // 이력서 - 군복무
+        map.put("B-MILITARY-PERIOD", "B-MILITARY-PERIOD-FIELD");
+        map.put("B-MILITARY-RANK", "B-MILITARY-RANK-FIELD");
+        map.put("B-MILITARY-STATUS", "B-MILITARY-STATUS-FIELD");
+        map.put("B-MILITARY-TYPE", "B-MILITARY-TYPE-FIELD");
+
+        // 이력서 - 경력
+        map.put("B-WORK-DUTY", "B-WORK-DUTY-FIELD");
+        map.put("B-WORK-PERIOD", "B-WORK-PERIOD-FIELD");
+        map.put("B-WORK-PLACE", "B-WORK-PLACE-FIELD");
+        map.put("B-WORK-NAME", "B-WORK-NAME-FIELD");
+        map.put("B-WORK-POSITION", "B-WORK-POSITION-FIELD");
+
+        // 업무일지
+        map.put("B-DATE", "B-DATE-FIELD");
+        map.put("B-DEPT", "B-DEPT-FIELD");
+        map.put("B-NAME", "B-NAME-FIELD");
+        map.put("B-POSITION", "B-POSITION-FIELD");
+        map.put("B-REPORT-ISSUE", "B-REPORT-ISSUE-FIELD");
+        map.put("B-TODAY-WORK-DETAIL", "B-TODAY-WORK-DETAIL-FIELD");
+        map.put("B-TODAY-WORK-NOTE", "B-TODAY-WORK-NOTE-FIELD");
+        map.put("B-TODAY-WORK-TIME", "B-TODAY-WORK-TIME-FIELD");
+        map.put("B-TODAY-WORK-TITLE", "B-TODAY-WORK-TITLE-FIELD");
+        map.put("B-TOMORROW-WORK-AM-PLAN", "B-TOMORROW-WORK-AM-PLAN-FIELD");
+        map.put("B-TOMORROW-WORK-PM-PLAN", "B-TOMORROW-WORK-PM-PLAN-FIELD");
+
+
+        // 자기소개서
+        map.put("B-ACADEMIC-LIFE", "B-ACADEMIC-LIFE-FIELD");
+        map.put("B-MOTIVATION-FUTURE", "B-MOTIVATION-FUTURE-FIELD");
+        map.put("B-PERSONALITY", "B-PERSONALITY-FIELD");
+        map.put("B-SELF-GROWTH", "B-SELF-GROWTH-FIELD");
+
+        // 재직증명서
+        map.put("B-CEO-SIGN", "B-CEO-SIGN-FIELD");
+        map.put("B-EMPLOY-DEPT", "B-EMPLOY-DEPT-FIELD");
+        map.put("B-EMPLOY-PERIOD", "B-EMPLOY-PERIOD-FIELD");
+        map.put("B-EMPLOY-POSITION", "B-EMPLOY-POSITION-FIELD");
+        map.put("B-PLACE-ADDR", "B-PLACE-ADDR-FIELD");
+        map.put("B-PLACE-NAME", "B-PLACE-NAME-FIELD");
+        map.put("B-PURPOSE", "B-PURPOSE-FIELD");
+
+        // 위임장
+        map.put("B-DELEGATE-ADDR", "B-DELEGATE-ADDR-FIELD");
+        map.put("B-DELEGATE-NAME", "B-DELEGATE-NAME-FIELD");
+        map.put("B-DELEGATE-PHONE", "B-DELEGATE-PHONE-FIELD");
+        map.put("B-DELEGATE-RELATION", "B-DELEGATE-RELATION-FIELD");
+        map.put("B-DELEGATE-RRN", "B-DELEGATE-RRN-FIELD");
+        map.put("B-GRANT-CONTENT", "B-GRANT-CONTENT-FIELD");
+        map.put("B-GRANTOR-ADDR", "B-GRANTOR-ADDR-FIELD");
+        map.put("B-GRANTOR-NAME", "B-GRANTOR-NAME-FIELD");
+        map.put("B-GRANTOR-PHONE", "B-GRANTOR-PHONE-FIELD");
+        map.put("B-GRANTOR-REASON", "B-GRANTOR-REASON-FIELD");
+        map.put("B-GRANTOR-RRN", "B-GRANTOR-RRN-FIELD");
+
+        // 오타로 보이는 항목
+        //map.put("B-GRANT-CONTENT", "B-GRANT-CONTENT-FILED");
+
+        // ?
+        map.put("B-DATE-DOCUMENT", "B-DATE-DOCUMENT-FIELD");
+
+        // common
+        map.put("B-SIGN-DAY", "B-SIGN-DAY-FIELD");
+        map.put("B-SIGN-MONTH", "B-SIGN-MONTH-FIELD");
+        map.put("B-SIGN-NAME", "B-SIGN-NAME-FIELD");
+        map.put("B-SIGN-YEAR", "B-SIGN-YEAR-FIELD");
+        map.put("B-PERSONAL-ADDR", "B-PERSONAL-ADDR-FIELD");
+        map.put("B-PERSONAL-EMAIL", "B-PERSONAL-EMAIL-FIELD");
+        map.put("B-PERSONAL-NAME", "B-PERSONAL-NAME-FIELD");
+        map.put("B-PERSONAL-PHONE", "B-PERSONAL-PHONE-FIELD");
+        map.put("B-PERSONAL-RRN", "B-PERSONAL-RRN-FIELD");
+        map.put("B-PERSONAL-PHOTO", "B-PERSONAL-PHOTO-FIELD");
+
+        fieldToTargetField = Collections.unmodifiableMap(map);
+    }
+
+    public static String getTargetField(String field) {
+        return fieldToTargetField.get(field);
+    }
+
+    public static boolean hasTargetField(String field) {
+        return fieldToTargetField.containsKey(field);
+    }
+
+    public static Map<String, String> getAllMappings() {
+        return fieldToTargetField;
+    }
+
+    public static String getFieldByTargetField(String targetField) {
+        for (Map.Entry<String, String> entry : fieldToTargetField.entrySet()) {
+            if (entry.getValue().equals(targetField)) {
+                return entry.getKey();
+            }
+        }
+        return null;
+    }
+
+}
diff --git a/src/main/java/Sprout_Squad/EyeOn/global/flask/service/FlaskService.java b/src/main/java/Sprout_Squad/EyeOn/global/flask/service/FlaskService.java
index 5e1fcd5..c755ed3 100644
--- a/src/main/java/Sprout_Squad/EyeOn/global/flask/service/FlaskService.java
+++ b/src/main/java/Sprout_Squad/EyeOn/global/flask/service/FlaskService.java
@@ -1,44 +1,323 @@
 package Sprout_Squad.EyeOn.global.flask.service;
 
+import Sprout_Squad.EyeOn.domain.document.web.dto.ModifyDocumentReq;
+import Sprout_Squad.EyeOn.domain.document.web.dto.ModifyDocumentReqWrapper;
+import Sprout_Squad.EyeOn.domain.document.web.dto.WriteDocsReq;
+import Sprout_Squad.EyeOn.domain.document.web.dto.WriteDocsReqWrapper;
+import Sprout_Squad.EyeOn.global.flask.dto.GetFieldForModifyRes;
+import Sprout_Squad.EyeOn.global.flask.dto.GetFieldForWriteRes;
+import Sprout_Squad.EyeOn.global.flask.dto.GetModelRes;
+import Sprout_Squad.EyeOn.domain.user.entity.User;
+import Sprout_Squad.EyeOn.domain.user.repository.UserRepository;
+import Sprout_Squad.EyeOn.global.auth.jwt.UserPrincipal;
+import Sprout_Squad.EyeOn.global.converter.ImgConverter;
+import Sprout_Squad.EyeOn.global.external.service.PdfService;
+import Sprout_Squad.EyeOn.global.flask.dto.GetModelResForModify;
+import Sprout_Squad.EyeOn.global.flask.exception.GetLabelFailedException;
+import Sprout_Squad.EyeOn.global.flask.exception.TypeDetectedFiledException;
+import Sprout_Squad.EyeOn.global.flask.mapper.FieldLabelMapper;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.*;
 import org.springframework.stereotype.Service;
 import org.springframework.web.client.RestTemplate;
+import org.springframework.web.multipart.MultipartFile;
 
-import java.util.HashMap;
-import java.util.Map;
+import java.util.*;
 
 @Service
 @RequiredArgsConstructor
 public class FlaskService {
     private final RestTemplate restTemplate;
+    private final PdfService pdfService;
+    private final FieldLabelMapper fieldLabelMapper;
+    private final UserRepository userRepository;
     private final ObjectMapper objectMapper = new ObjectMapper();
     private String baseUrl = "http://3.39.215.178:5050";
 
     /**
-     * 문서 필드 분석 (라벨링)
+     * 모델에서 문서 분석 결과를 받아 가공 (작성)
      */
-    public String getLabel(String base64Image, String fileExt) throws JsonProcessingException {
-        Map<String, Object> responseBody = sendFlaskPostRequest("/api/ai/create", base64Image, fileExt);
+    public GetModelRes getResFromModelForWrite(MultipartFile file, String fileName){
+        try {
+            String fileToBase64 = ImgConverter.toBase64(file);
+            String fileExtension = pdfService.getFileExtension(fileName);
+
+            // 플라스크 요청
+            String jsonRes = getLabelForWrite(fileToBase64, fileExtension);
+
+            // jsonRes를 파싱
+            ObjectMapper mapper = new ObjectMapper();
+            Map<String, Object> resultMap = mapper.readValue(jsonRes, Map.class);
+
+            // tokens: 문서에서 추출된 텍스트 조각
+            List<String> tokens = (List<String>) resultMap.get("tokens");
+
+            // labels: 각 토큰의 labels
+            List<String> labels = (List<String>) resultMap.get("labels");
+
+            // doctype: 문서 유형
+            String doctype = (String) resultMap.get("doctype");
+
+            // rawBboxes: 각 토큰의 bounding box 좌표 정보
+            List<List<?>> rawBboxes = (List<List<?>>) resultMap.get("bboxes");
+
+            // bboxes: 각 토큰의 bounding box 좌표 정보
+            List<List<Double>> bboxes = new ArrayList<>();
+
+            // List<?> 형태로 파싱된 좌표 데이터를 List<Double>로 변환
+            for (List<?> box : rawBboxes) {
+                List<Double> convertedBox = box.stream()
+                        .map(val -> ((Number) val).doubleValue()) // JSON 파싱 결과가 Number 타입 -> 형변환 필요
+                        .toList();
+                bboxes.add(convertedBox);
+            }
+            return GetModelRes.of(doctype, tokens, bboxes, labels);
+        } catch (Exception e){ throw new GetLabelFailedException();}
+    }
+
+    /**
+     * 작성을 위한 문서 필드 분석(라벨링) 요청
+     */
+    public String getLabelForWrite(String base64Image, String fileExt) throws JsonProcessingException {
+        Map<String, Object> responseBody = sendJsonRequestToFlask("/api/ai/create", base64Image, fileExt);
         Map result = (Map) responseBody.get("result");
-        System.out.println("결과 : " + result);
         return objectMapper.writeValueAsString(result);  // result 전체를 JSON 문자열로 변환
     }
 
     /**
-     * 문서 유형 감지
+     * 모델에서 문서 분석 결과를 받아 가공 (수정)
      */
-    public String detectType(String base64Image, String fileExt) {
-        Map<String, Object> responseBody = sendFlaskPostRequest("/api/ai/detect", base64Image, fileExt);
-        return (String) responseBody.get("doc_type");
+    public GetModelResForModify getResFromModelForModify(MultipartFile file, String fileName){
+        try {
+            String fileToBase64 = ImgConverter.toBase64(file);
+            String fileExtension = pdfService.getFileExtension(fileName);
+
+            // Flask에 요청
+            String jsonRes = getLabelForModify(fileToBase64, fileExtension);
+
+            // 응답 파싱
+            ObjectMapper mapper = new ObjectMapper();
+            Map<String, Object> rootMap = mapper.readValue(jsonRes, Map.class);
+            Map<String, Object> resultMap = (Map<String, Object>) rootMap.get("layoutlm_result");
+            Map<String, Object> mergedMap = (Map<String, Object>) rootMap.get("merged_tokens");
+
+            String doctype = (String) resultMap.get("doctype");
+            List<String> tokens = (List<String>) resultMap.get("tokens");
+            List<String> labels = (List<String>) resultMap.get("labels");
+
+            List<List<Double>> bboxes = new ArrayList<>();
+            List<List<?>> rawBboxes = (List<List<?>>) resultMap.get("bboxes");
+            for (List<?> box : rawBboxes) {
+                List<Double> converted = box.stream()
+                        .map(val -> ((Number) val).doubleValue())
+                        .toList();
+                bboxes.add(converted);
+            }
+
+            List<String> mergedTokens = (List<String>) mergedMap.get("tokens");
+
+            // 인덱스 생성
+            List<Integer> indices = new ArrayList<>();
+            for (int i = 0; i < bboxes.size(); i++) {
+                indices.add(i);
+            }
+
+            return new GetModelResForModify(doctype, tokens, bboxes, labels, indices, mergedTokens);
+
+        } catch (Exception e) {
+            throw new GetLabelFailedException();
+        }
+    }
+
+
+    /**
+     * 수정을 위한 문서 필드 분석(라벨링) 요청
+     */
+    public String getLabelForModify(String base64Image, String fileExt) throws JsonProcessingException {
+        Map<String, Object> responseBody = sendJsonRequestToFlask("/api/ai/modify", base64Image, fileExt);
+        Map result = (Map) responseBody.get("result");
+        return objectMapper.writeValueAsString(result);  // result 전체를 JSON 문자열로 변환
+    }
+
+    /**
+     * 문서 타입에 맞는 필드의 라벨명을 반환
+     */
+    private Map<String, String> getLabelMap(String docType){
+        // context는 중첩된 Map 구조
+        Map<String, Map<String, String>> context = fieldLabelMapper.getContextualLabels();
+
+        // doctype에 맞는 Map을 복사
+        Map<String, String> labelMap = new HashMap<>(context.getOrDefault(docType, Collections.emptyMap()));
+
+        // common 항목에 대하여 Map을 복사
+        Map<String, String> commonMap = context.getOrDefault("common", Collections.emptyMap());
+
+        // labelMap에 공통 항목까지 삽입
+        labelMap.putAll(commonMap);
+
+        return labelMap;
+    }
+
+    /**
+     * 필드 라벨에 따라 사용자 정보를 채워넣어 반환
+     */
+    private String resolveValue(String baseLabel, User user) {
+        return switch (baseLabel) {
+            case "B-PERSONAL-NAME", "B-GRANTOR-NAME", "B-DELEGATE-NAME", "B-NAME", "B-SIGN-NAME" -> user.getName();
+            case "B-PERSONAL-RRN", "B-GRANTOR-RRN", "B-DELEGATE-RRN" -> user.getResidentNumber();
+            case "B-PERSONAL-PHONE", "B-GRANTOR-PHONE", "B-DELEGATE-PHONE" -> user.getPhoneNumber();
+            case "B-PERSONAL-ADDR", "B-GRANTOR-ADDR", "B-DELEGATE-ADDR" -> user.getAddress();
+            case "B-PERSONAL-EMAIL" -> user.getEmail();
+            default -> null; // 나머지는 프론트에서 받기
+        };
+    }
+
+    /**
+     * 모델로부터 얻은 결과를 가공 및 사용자 정보를 채워넣어 문서 수정 양식에 맞는 형태로 반환
+     */
+    public List<GetFieldForModifyRes> getFieldForModify(GetModelResForModify getModelResForModify) {
+        List<String> labels = getModelResForModify.labels();
+        List<String> mergedTokens = getModelResForModify.mergedTokens();
+        List<List<Double>> bboxes = getModelResForModify.bboxes();
+        Map<String, String> labelMap = getLabelMap(getModelResForModify.doctype());
+
+        List<GetFieldForModifyRes> results = new ArrayList<>();
+
+        for (int i = 0; i < labels.size(); i++) {
+            String label = labels.get(i);
+            if (!label.endsWith("-FIELD")) continue;
+
+            String field = label.replace("-FIELD", "");
+            String displayName = labelMap.getOrDefault(field, field);
+
+            if (i >= mergedTokens.size()) continue;
+
+            String value = mergedTokens.get(i);
+            if (value == null || value.trim().equals("[BLANK]")) continue;
+
+            List<Double> bbox = bboxes.get(i);
+            results.add(new GetFieldForModifyRes(field, label, i, bbox, displayName, value));
+        }
+
+        return results;
+    }
+
+
+
+    /**
+     * 모델로부터 얻은 결과를 가공 및 사용자 정보를 채워넣어 문서 작성 양식에 맞는 형태로 반환
+     */
+    public List<GetFieldForWriteRes> getFieldForWrite(GetModelRes getModelRes, UserPrincipal userPrincipal) {
+        User user = userRepository.getUserById(userPrincipal.getId());
+        Map<String, String> labelMap = getLabelMap(getModelRes.doctype());
+        List<GetFieldForWriteRes> fields = new ArrayList<>();
+
+        List<String> labels = getModelRes.labels();
+        List<String> tokens = getModelRes.tokens();
+        List<Integer> indices = getModelRes.indices();
+        List<List<Double>> bboxes = getModelRes.bboxes();
+
+        for (int i = 0; i < labels.size(); i++) {
+            String label = labels.get(i);
+
+            if (label.endsWith("-FIELD")) {
+                String field = label.replace("-FIELD", "");
+                String targetField = label;
+                String displayName = labelMap.getOrDefault(field, field);
+                String value = resolveValue(field, user);
+
+                int actualIndex = indices.get(i);
+                List<Double> bbox = bboxes.get(i);
+
+                fields.add(new GetFieldForWriteRes(
+                        field,
+                        targetField,
+                        actualIndex,
+                        bbox,
+                        displayName,
+                        value
+                ));
+            }
+        }
+
+        return fields;
+    }
+
+
+    /**
+     * 수정할 문서 분석 요청
+     */
+    public String getModifyLabelReq(String base64Image, String fileExt) throws JsonProcessingException {
+        Map<String, Object> responseBody = sendJsonRequestToFlask("/api/ai/modify", base64Image, fileExt);
+        Map result = (Map) responseBody.get("result");
+        System.out.println(result);
+        return objectMapper.writeValueAsString(result);
+    }
+
+    /**
+     * 수정 문석 분석 결과를 바탕으로 modifyDocumentReq와 비교하여 WriteDocsReqWrapper 를 반환
+     */
+    public WriteDocsReqWrapper getModifyRes(String aiResult, ModifyDocumentReqWrapper modifyDocumentReqWrapper) {
+        try {
+            Map<String, Object> resultMap = objectMapper.readValue(aiResult, Map.class);
+
+            Map<String, Object> layoutlmResult = (Map<String, Object>) resultMap.get("layoutlm_result");
+            List<String> labels = (List<String>) layoutlmResult.get("labels");
+            List<List<Double>> bboxes = (List<List<Double>>) layoutlmResult.get("bboxes");
+            String doctype = (String) layoutlmResult.get("doctype");
+
+            List<WriteDocsReq> resultList = new ArrayList<>();
+
+            // 클라이언트가 보내준 index는 layoutlm 기준임
+            for (ModifyDocumentReq modify : modifyDocumentReqWrapper.data()) {
+                int index = modify.i();
+                String value = modify.v();
+
+                if (index >= labels.size() || index >= bboxes.size()) continue;
+
+                String targetField = labels.get(index); // B-XXX-FIELD
+                String field = targetField.replace("-FIELD", ""); // B-XXX
+                List<Double> bbox = bboxes.get(index);
+                String displayName = fieldLabelMapper.getDisplayName(doctype, field);
+
+                resultList.add(new WriteDocsReq(
+                        field,
+                        targetField,
+                        index,
+                        bbox,
+                        displayName,
+                        value
+                ));
+            }
+
+            System.out.println("결과는? : " + resultList);
+            return new WriteDocsReqWrapper(resultList);
+
+        } catch (Exception e) {
+            throw new RuntimeException("수정 결과 가공 실패", e);
+        }
+    }
+
+    /**
+     * 문서 유형 감지 바디 구성
+     */
+    public String detectType(MultipartFile file, String fileName) {
+        try {
+            String base64Image = ImgConverter.toBase64(file);
+            String fileExt = pdfService.getFileExtension(fileName);
+            Map<String, Object> responseBody = sendJsonRequestToFlask("/api/ai/detect", base64Image, fileExt);
+            return (String) responseBody.get("doc_type");
+        } catch (Exception e) {
+            throw new TypeDetectedFiledException();
+        }
     }
 
     /**
-     * 공통 요청 처리 메서드
+     * 문서 작성, 필드 분석,  문서 수정 필드 분석 요청 처리 메서드
      */
-    private Map<String, Object> sendFlaskPostRequest(String path, String base64Image, String fileExt) {
+    private Map<String, Object> sendJsonRequestToFlask(String path, String base64Image, String fileExt) {
         String endpoint = baseUrl + path;
 
         Map<String, Object> requestBody = new HashMap<>();