diff --git a/src/main/ai/data/CategoryRecommendationQueue.py b/src/main/ai/data/CategoryRecommendationQueue.py
index 5db9dcd..205cd32 100644
--- a/src/main/ai/data/CategoryRecommendationQueue.py
+++ b/src/main/ai/data/CategoryRecommendationQueue.py
@@ -11,14 +11,14 @@ def __init__(self, sqs_client: boto3.client, queue_url: str):
         self.sqs = sqs_client
         self.queue_url = queue_url
 
-    def send_message(self, request_id: str, title: str, user_id: str):
+    def send_message(self, request_id: str, file_id: str, user_id: str):
         try:
             message_body = {
                 'request_type': 'category_recommendation',
                 'request_id': request_id,
                 'user_id': str(user_id),
                 'payload': {
-                    'title': title
+                    'file_id': file_id
                 }
             }
             
diff --git a/src/main/ai/data/CategoryRecommendationRepository.py b/src/main/ai/data/CategoryRecommendationRepository.py
index 1813f95..88709e1 100644
--- a/src/main/ai/data/CategoryRecommendationRepository.py
+++ b/src/main/ai/data/CategoryRecommendationRepository.py
@@ -10,9 +10,9 @@ def __init__(self, client: MongoClient):
         self.db = client.get_database()
         self.collection: Collection = self.db.get_collection('category_recommendations')
 
-    def create_recommendation_request(self, title: str, user_id: str) -> dict:
+    def create_recommendation_request(self, file_id: str, user_id: str) -> dict:
         document = {
-            "title": title,
+            "file_id": file_id,
             "user_id": user_id,
             "is_completed": False,
             "created_at": self.get_current_time()
diff --git a/src/main/ai/models/CategoryRecommendation.py b/src/main/ai/models/CategoryRecommendation.py
index e20e032..a71e42e 100644
--- a/src/main/ai/models/CategoryRecommendation.py
+++ b/src/main/ai/models/CategoryRecommendation.py
@@ -4,7 +4,7 @@
 
 
 class CategoryRecommendationRequest(BaseModel):
-    title: str
+    file_id: str
 
 
 class CategoryRecommendationResponse(BaseModel):
diff --git a/src/main/ai/router/AIPublicAPIRouter.py b/src/main/ai/router/AIPublicAPIRouter.py
index e507e74..c23218c 100644
--- a/src/main/ai/router/AIPublicAPIRouter.py
+++ b/src/main/ai/router/AIPublicAPIRouter.py
@@ -22,7 +22,7 @@ async def create_category_recommendation_request(
     service: CategoryRecommendationService = Depends(get_category_recommendation_service)
 ):
     """
-    자료 제목에 따른 추천 카테고리 요청
+    업로드한 파일에 따른 추천 카테고리 요청
     """
     return service.create_recommendation_request(request, user_id)
 
@@ -34,7 +34,7 @@ async def get_category_recommendation_status(
     service: CategoryRecommendationService = Depends(get_category_recommendation_service)
 ):
     """
-    자료 제목에 따른 추천 카테고리 조회
+    업로드한 파일에 따른 추천 카테고리 조회
     """
     result = service.get_recommendation_status(request_id, user_id)
     
diff --git a/src/main/ai/service/CategoryRecommendationService.py b/src/main/ai/service/CategoryRecommendationService.py
index 9638859..d90d0c3 100644
--- a/src/main/ai/service/CategoryRecommendationService.py
+++ b/src/main/ai/service/CategoryRecommendationService.py
@@ -20,7 +20,7 @@ def __init__(self, repository: CategoryRecommendationRepository, queue: Category
     def create_recommendation_request(self, request: CategoryRecommendationRequest, user_id: uuid.UUID) -> CategoryRecommendationResponse:
         # MongoDB에 저장 - ObjectId 자동 생성
         document = self.repository.create_recommendation_request(
-            title=request.title,
+            file_id=request.file_id,
             user_id=str(user_id)
         )
         
@@ -30,7 +30,7 @@ def create_recommendation_request(self, request: CategoryRecommendationRequest,
         # 메시지 발행
         self.queue.send_message(
             request_id=request_id,
-            title=request.title,
+            file_id=request.file_id,
             user_id=str(user_id)
         )
         
diff --git a/src/tests/ai/data/test_category_recommendation_queue.py b/src/tests/ai/data/test_category_recommendation_queue.py
index a6dafef..97afe21 100644
--- a/src/tests/ai/data/test_category_recommendation_queue.py
+++ b/src/tests/ai/data/test_category_recommendation_queue.py
@@ -16,7 +16,7 @@ def setup_method(self):
     def test_send_message_success(self):
         # given
         request_id = "test-request-id"
-        title = "테스트 제목"
+        file_id = "67dd86ac60a0a6d929904d47"
         user_id = "test-user-id"
         
         # SQS 응답 설정
@@ -24,7 +24,7 @@ def test_send_message_success(self):
         self.mock_sqs_client.send_message.return_value = expected_response
         
         # when
-        result = self.queue.send_message(request_id, title, user_id)
+        result = self.queue.send_message(request_id, file_id, user_id)
         
         # then
         expected_message_body = {
@@ -32,7 +32,7 @@ def test_send_message_success(self):
             'request_id': request_id,
             'user_id': user_id,
             'payload': {
-                'title': title
+                'file_id': file_id
             }
         }
         
@@ -47,7 +47,7 @@ def test_send_message_success(self):
     def test_send_message_with_exception(self):
         # given
         request_id = "test-request-id"
-        title = "테스트 제목"
+        file_id = "67dd86ac60a0a6d929904d47"
         user_id = "test-user-id"
         
         # SQS 예외 발생 설정
@@ -55,7 +55,7 @@ def test_send_message_with_exception(self):
         
         # when/then
         with pytest.raises(Exception) as e:
-            self.queue.send_message(request_id, title, user_id)
+            self.queue.send_message(request_id, file_id, user_id)
         
         assert "SQS error" in str(e.value)
         
@@ -64,7 +64,7 @@ def test_send_message_with_exception(self):
             'request_id': request_id,
             'user_id': user_id,
             'payload': {
-                'title': title
+                'file_id': file_id
             }
         }
         
diff --git a/src/tests/ai/data/test_category_recommendation_repository.py b/src/tests/ai/data/test_category_recommendation_repository.py
index 651b0a3..ffce54d 100644
--- a/src/tests/ai/data/test_category_recommendation_repository.py
+++ b/src/tests/ai/data/test_category_recommendation_repository.py
@@ -32,7 +32,7 @@ def teardown_method(self):
     
     def test_create_recommendation_request(self):
         # given
-        title = "테스트 제목"
+        file_id = "67dd86ac60a0a6d929904d47"
         user_id = "test-user-id"
         mock_id = ObjectId("6123456789abcdef01234567")
         
@@ -40,11 +40,11 @@ def test_create_recommendation_request(self):
         self.mock_collection.insert_one.return_value = MagicMock(inserted_id=mock_id)
         
         # when
-        result = self.repository.create_recommendation_request(title, user_id)
+        result = self.repository.create_recommendation_request(file_id, user_id)
         
         # then
         expected_doc = {
-            "title": title,
+            "file_id": file_id,
             "user_id": user_id,
             "is_completed": False,
             "created_at": datetime(2023, 1, 1, tzinfo=timezone.utc),
@@ -61,7 +61,7 @@ def test_get_recommendation_by_id(self):
         user_id = "test-user-id"
         expected_result = {
             "_id": ObjectId(request_id),
-            "title": "테스트 제목",
+            "file_id": "67dd86ac60a0a6d929904d47",
             "user_id": user_id,
             "is_completed": False,
             "created_at": datetime(2023, 1, 1, tzinfo=timezone.utc)
@@ -102,7 +102,7 @@ def test_update_recommendation_result(self):
         
         expected_doc = {
             "_id": ObjectId(request_id),
-            "title": "테스트 제목",
+            "file_id": "67dd86ac60a0a6d929904d47",
             "user_id": "test-user-id",
             "is_completed": True,
             "predicted_category": predicted_category,
diff --git a/src/tests/ai/models/test_category_recommendation_models.py b/src/tests/ai/models/test_category_recommendation_models.py
index 43ec33e..b22f15d 100644
--- a/src/tests/ai/models/test_category_recommendation_models.py
+++ b/src/tests/ai/models/test_category_recommendation_models.py
@@ -13,16 +13,16 @@
 class TestCategoryRecommendationModels:
     def test_category_recommendation_request_valid(self):
         # given
-        title = "테스트 제목"
+        file_id = "67dd86ac60a0a6d929904d47"
         
         # when
-        model = CategoryRecommendationRequest(title=title)
+        model = CategoryRecommendationRequest(file_id=file_id)
         
         # then
-        assert model.title == title
+        assert model.file_id == file_id
     
     def test_category_recommendation_request_invalid(self):
-        # when/then - 제목이 없는 경우 검증 오류
+        # when/then - 파일 ID가 없는 경우 검증 오류
         with pytest.raises(ValidationError):
             CategoryRecommendationRequest()
     
diff --git a/src/tests/ai/router/test_ai_public_api_router.py b/src/tests/ai/router/test_ai_public_api_router.py
index caff74c..9d8fdd9 100644
--- a/src/tests/ai/router/test_ai_public_api_router.py
+++ b/src/tests/ai/router/test_ai_public_api_router.py
@@ -34,15 +34,15 @@ def client():
 class TestAIPublicAPIRouter:
     def setup_method(self):
         # 테스트 공통 데이터
-        self.test_title = "테스트 제목"
+        self.test_file_id = "67dd86ac60a0a6d929904d47"
         self.test_user_id = uuid.UUID("12345678-1234-5678-1234-567812345678")
         self.test_request_id = "6123456789abcdef01234567"
-        self.test_file_id = "7123456789abcdef01234567"
+        self.test_check_file_id = "7123456789abcdef01234567"
     
     def test_create_category_recommendation_request(self, client):
         # given
         request_data = {
-            "title": self.test_title
+            "file_id": self.test_file_id
         }
         
         # 서비스 응답 모의 설정
@@ -107,23 +107,23 @@ def test_get_file_duplicate_check_status_exists(self, client):
             # 서비스 응답 설정
             mock_service.return_value = FileDuplicateCheckStatusResponse(
                 request_id=self.test_request_id,
-                file_id=self.test_file_id,
+                file_id=self.test_check_file_id,
                 is_completed=True,
                 is_duplicated=False
             )
             
             # when
-            response = client.get(f"/ai/file-duplicate-checks?file_id={self.test_file_id}")
+            response = client.get(f"/ai/file-duplicate-checks?file_id={self.test_check_file_id}")
             
             # then
             assert response.status_code == 200
             assert response.json() == {
                 "request_id": self.test_request_id,
-                "file_id": self.test_file_id,
+                "file_id": self.test_check_file_id,
                 "is_completed": True,
                 "is_duplicated": False
             }
-            mock_service.assert_called_once_with(self.test_file_id, str(self.test_user_id))
+            mock_service.assert_called_once_with(self.test_check_file_id, str(self.test_user_id))
     
     def test_get_file_duplicate_check_status_not_found(self, client):
         # given
@@ -133,11 +133,11 @@ def test_get_file_duplicate_check_status_not_found(self, client):
             mock_service.return_value = None
             
             # when
-            response = client.get(f"/ai/file-duplicate-checks?file_id={self.test_file_id}")
+            response = client.get(f"/ai/file-duplicate-checks?file_id={self.test_check_file_id}")
             
             # then
             assert response.status_code == 404
             assert response.json() == {
                 "detail": "요청을 찾을 수 없습니다. 존재하지 않는 ID입니다."
             }
-            mock_service.assert_called_once_with(self.test_file_id, str(self.test_user_id)) 
\ No newline at end of file
+            mock_service.assert_called_once_with(self.test_check_file_id, str(self.test_user_id)) 
\ No newline at end of file
diff --git a/src/tests/ai/service/test_category_recommendation_service.py b/src/tests/ai/service/test_category_recommendation_service.py
index 47c75dd..9fa6c5f 100644
--- a/src/tests/ai/service/test_category_recommendation_service.py
+++ b/src/tests/ai/service/test_category_recommendation_service.py
@@ -23,19 +23,19 @@ def setup_method(self):
         self.service = CategoryRecommendationService(self.mock_repository, self.mock_queue)
         
         # 테스트 공통 데이터
-        self.test_title = "테스트 제목"
+        self.test_file_id = "67dd86ac60a0a6d929904d47"
         self.test_user_id = uuid.UUID("12345678-1234-5678-1234-567812345678")
         self.test_request_id = "6123456789abcdef01234567"
         self.test_object_id = ObjectId(self.test_request_id)
     
     def test_create_recommendation_request(self):
         # given
-        request = CategoryRecommendationRequest(title=self.test_title)
+        request = CategoryRecommendationRequest(file_id=self.test_file_id)
         
         # 리포지토리 응답 설정
         mongo_document = {
             "_id": self.test_object_id,
-            "title": self.test_title,
+            "file_id": self.test_file_id,
             "user_id": str(self.test_user_id),
             "is_completed": False,
             "created_at": datetime(2023, 1, 1, tzinfo=timezone.utc)
@@ -47,13 +47,13 @@ def test_create_recommendation_request(self):
         
         # then
         self.mock_repository.create_recommendation_request.assert_called_once_with(
-            title=self.test_title,
+            file_id=self.test_file_id,
             user_id=str(self.test_user_id)
         )
         
         self.mock_queue.send_message.assert_called_once_with(
             request_id=self.test_request_id,
-            title=self.test_title,
+            file_id=self.test_file_id,
             user_id=str(self.test_user_id)
         )
         
@@ -65,7 +65,7 @@ def test_get_recommendation_status_exists(self):
         # 리포지토리 응답 설정 - 완료되지 않은 추천
         mongo_document = {
             "_id": self.test_object_id,
-            "title": self.test_title,
+            "file_id": self.test_file_id,
             "user_id": str(self.test_user_id),
             "is_completed": False,
             "created_at": datetime(2023, 1, 1, tzinfo=timezone.utc)
@@ -90,7 +90,7 @@ def test_get_recommendation_status_completed(self):
         # 리포지토리 응답 설정 - 완료된 추천
         mongo_document = {
             "_id": self.test_object_id,
-            "title": self.test_title,
+            "file_id": self.test_file_id,
             "user_id": str(self.test_user_id),
             "is_completed": True,
             "predicted_category": "기술",
@@ -134,7 +134,7 @@ def test_update_recommendation_result_success(self):
         # 리포지토리 응답 설정
         updated_document = {
             "_id": self.test_object_id,
-            "title": self.test_title,
+            "file_id": self.test_file_id,
             "user_id": str(self.test_user_id),
             "is_completed": True,
             "predicted_category": "기술",