diff --git a/src/main/java/notai/auth/AuthArgumentResolver.java b/src/main/java/notai/auth/AuthArgumentResolver.java
index d832eba..c81cb96 100644
--- a/src/main/java/notai/auth/AuthArgumentResolver.java
+++ b/src/main/java/notai/auth/AuthArgumentResolver.java
@@ -25,7 +25,7 @@ public boolean supportsParameter(MethodParameter parameter) {
     }
 
     @Override
-    public Long resolveArgument(
+    public Member resolveArgument(
             MethodParameter parameter,
             ModelAndViewContainer mavContainer,
             NativeWebRequest webRequest,
@@ -33,6 +33,6 @@ public Long resolveArgument(
     ) {
         HttpServletRequest request = (HttpServletRequest) webRequest.getNativeRequest();
         Long memberId = (Long) request.getAttribute("memberId");
-        return memberRepository.getById(memberId).getId();
+        return memberRepository.getById(memberId);
     }
 }
diff --git a/src/main/java/notai/document/application/DocumentQueryService.java b/src/main/java/notai/document/application/DocumentQueryService.java
index 6cbb050..ed0c11d 100644
--- a/src/main/java/notai/document/application/DocumentQueryService.java
+++ b/src/main/java/notai/document/application/DocumentQueryService.java
@@ -4,6 +4,7 @@
 import notai.document.application.result.DocumentFindResult;
 import notai.document.domain.Document;
 import notai.document.domain.DocumentRepository;
+import notai.member.domain.Member;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -21,8 +22,8 @@ public List<DocumentFindResult> findDocuments(Long folderId) {
         return documents.stream().map(this::getDocumentFindResult).toList();
     }
 
-    public List<DocumentFindResult> findRootDocuments(Long memberId) {
-        List<Document> documents = documentRepository.findAllByMemberIdAndFolderIdIsNull(memberId);
+    public List<DocumentFindResult> findRootDocuments(Member member) {
+        List<Document> documents = documentRepository.findAllByMemberIdAndFolderIdIsNull(member.getId());
         return documents.stream().map(this::getDocumentFindResult).toList();
     }
 
diff --git a/src/main/java/notai/document/application/DocumentService.java b/src/main/java/notai/document/application/DocumentService.java
index 028e750..801c6cf 100644
--- a/src/main/java/notai/document/application/DocumentService.java
+++ b/src/main/java/notai/document/application/DocumentService.java
@@ -10,7 +10,6 @@
 import notai.folder.domain.Folder;
 import notai.folder.domain.FolderRepository;
 import notai.member.domain.Member;
-import notai.member.domain.MemberRepository;
 import notai.ocr.application.OCRService;
 import notai.pdf.PdfService;
 import notai.pdf.result.PdfSaveResult;
@@ -29,33 +28,31 @@ public class DocumentService {
     private final OCRService ocrService;
     private final DocumentRepository documentRepository;
     private final FolderRepository folderRepository;
-    private final MemberRepository memberRepository;
 
     private static final Long ROOT_FOLDER_ID = -1L;
 
     public DocumentSaveResult saveDocument(
-            Long memberId, Long folderId, MultipartFile pdfFile, DocumentSaveRequest documentSaveRequest
+            Member member, Long folderId, MultipartFile pdfFile, DocumentSaveRequest documentSaveRequest
     ) {
         PdfSaveResult pdfSaveResult = pdfService.savePdf(pdfFile);
-        Document document = saveAndReturnDocument(memberId, folderId, documentSaveRequest, pdfSaveResult);
+        Document document = saveAndReturnDocument(member, folderId, documentSaveRequest, pdfSaveResult);
         ocrService.saveOCR(document, pdfSaveResult.pdf());
         return DocumentSaveResult.of(document.getId(), document.getName(), document.getUrl());
     }
 
     public DocumentSaveResult saveRootDocument(
-            Long memberId, MultipartFile pdfFile, DocumentSaveRequest documentSaveRequest
+            Member member, MultipartFile pdfFile, DocumentSaveRequest documentSaveRequest
     ) {
         PdfSaveResult pdfSaveResult = pdfService.savePdf(pdfFile);
-        Document document = saveAndReturnRootDocument(memberId, documentSaveRequest, pdfSaveResult);
+        Document document = saveAndReturnRootDocument(member, documentSaveRequest, pdfSaveResult);
         ocrService.saveOCR(document, pdfSaveResult.pdf());
         return DocumentSaveResult.of(document.getId(), document.getName(), document.getUrl());
     }
 
     public DocumentUpdateResult updateDocument(
-            Long memberId, Long folderId, Long documentId, DocumentUpdateRequest documentUpdateRequest
+            Member member, Long folderId, Long documentId, DocumentUpdateRequest documentUpdateRequest
     ) {
         Document document = documentRepository.getById(documentId);
-        Member member = memberRepository.getById(memberId);
 
         document.validateOwner(member);
 
@@ -68,10 +65,9 @@ public DocumentUpdateResult updateDocument(
     }
 
     public void deleteDocument(
-            Long memberId, Long folderId, Long documentId
+            Member member, Long folderId, Long documentId
     ) {
         Document document = documentRepository.getById(documentId);
-        Member member = memberRepository.getById(memberId);
 
         document.validateOwner(member);
 
@@ -83,18 +79,17 @@ public void deleteDocument(
     }
 
     public void deleteAllByFolder(
-            Long memberId, Folder folder
+            Member member, Folder folder
     ) {
         List<Document> documents = documentRepository.findAllByFolderId(folder.getId());
         for (Document document : documents) {
-            deleteDocument(memberId, folder.getId(), document.getId());
+            deleteDocument(member, folder.getId(), document.getId());
         }
     }
 
     private Document saveAndReturnDocument(
-            Long memberId, Long folderId, DocumentSaveRequest documentSaveRequest, PdfSaveResult pdfSaveResult
+            Member member, Long folderId, DocumentSaveRequest documentSaveRequest, PdfSaveResult pdfSaveResult
     ) {
-        Member member = memberRepository.getById(memberId);
         Folder folder = folderRepository.getById(folderId);
         Document document = new Document(folder,
                 member,
@@ -106,9 +101,8 @@ private Document saveAndReturnDocument(
     }
 
     private Document saveAndReturnRootDocument(
-            Long memberId, DocumentSaveRequest documentSaveRequest, PdfSaveResult pdfSaveResult
+            Member member, DocumentSaveRequest documentSaveRequest, PdfSaveResult pdfSaveResult
     ) {
-        Member member = memberRepository.getById(memberId);
         Document document = new Document(member,
                 documentSaveRequest.name(),
                 pdfSaveResult.pdfUrl(),