diff --git a/src/main/java/com/study/bookcafe/common/JsonHelper.java b/src/main/java/com/study/bookcafe/common/JsonHelper.java
index df242e2..ea3b90c 100644
--- a/src/main/java/com/study/bookcafe/common/JsonHelper.java
+++ b/src/main/java/com/study/bookcafe/common/JsonHelper.java
@@ -5,6 +5,7 @@
 import com.google.gson.ToNumberPolicy;
 
 import java.time.LocalDate;
+import java.time.LocalDateTime;
 
 public class JsonHelper {
     private static Gson gson;
@@ -13,6 +14,7 @@ public static Gson getGson() {
         if(gson == null) {
             gson = new GsonBuilder()
                     .registerTypeAdapter(LocalDate.class, new LocalDateAdapter())
+                    .registerTypeAdapter(LocalDateTime.class, new LocalDateTimeAdapter())
                     .setPrettyPrinting()
                     .serializeNulls()
                     .disableHtmlEscaping()
diff --git a/src/main/java/com/study/bookcafe/common/LocalDateTimeAdapter.java b/src/main/java/com/study/bookcafe/common/LocalDateTimeAdapter.java
new file mode 100644
index 0000000..5a43b21
--- /dev/null
+++ b/src/main/java/com/study/bookcafe/common/LocalDateTimeAdapter.java
@@ -0,0 +1,21 @@
+package com.study.bookcafe.common;
+
+import com.google.gson.*;
+
+import java.lang.reflect.Type;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class LocalDateTimeAdapter implements JsonDeserializer<LocalDateTime>, JsonSerializer<LocalDateTime> {
+    private static final DateTimeFormatter formatter = DateTimeFormatter.ISO_LOCAL_DATE;
+
+    @Override
+    public JsonElement serialize(LocalDateTime date, Type typeOfSrc, JsonSerializationContext context) {
+        return new JsonPrimitive(date.format(formatter)); // "yyyy-MM-dd" 형식으로 직렬화
+    }
+
+    @Override
+    public LocalDateTime deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
+        return LocalDateTime.parse(json.getAsString(), formatter); // JSON 문자열을 LocalDate로 역직렬화
+    }
+}
diff --git a/src/main/java/com/study/bookcafe/controller/MemberController.java b/src/main/java/com/study/bookcafe/controller/MemberController.java
index 24df377..c4eb7af 100644
--- a/src/main/java/com/study/bookcafe/controller/MemberController.java
+++ b/src/main/java/com/study/bookcafe/controller/MemberController.java
@@ -36,8 +36,8 @@ public ResponseEntity<MemberDto> member(@PathVariable long id) {
     @PostMapping("/member/borrow")
     @ResponseBody
     public ResponseEntity<List<BorrowDto>> borrowBook(@RequestBody RequestBorrowDto requestBorrowDto) {
-        List<Borrow> borrowList = memberService.borrowBook(requestBorrowDto.getMemberId(), requestBorrowDto.getBookdIdList());
-        return ResponseEntity.ok(borrowMapper.toBorrowDtoList(borrowList));
+        List<Borrow> borrows = memberService.borrowBook(requestBorrowDto.getMemberId(), requestBorrowDto.getBookdIdList());
+        return ResponseEntity.ok(borrowMapper.toBorrowDtoList(borrows));
     }
 
 }
diff --git a/src/main/java/com/study/bookcafe/dao/GeneralMemberRepository.java b/src/main/java/com/study/bookcafe/dao/GeneralMemberRepository.java
deleted file mode 100644
index 0f1baec..0000000
--- a/src/main/java/com/study/bookcafe/dao/GeneralMemberRepository.java
+++ /dev/null
@@ -1,23 +0,0 @@
-package com.study.bookcafe.dao;
-
-import com.study.bookcafe.domain.Level;
-import com.study.bookcafe.domain.Member;
-import org.springframework.stereotype.Repository;
-
-import java.util.HashMap;
-import java.util.Map;
-
-@Repository
-public class GeneralMemberRepository implements MemberRepository {
-
-    Map<Long, Member> members = new HashMap<>(){{
-        put(1L, Member.builder().id(1L).name("슈카").level(Level.BASIC).borrowCount(0).build());
-        put(2L, Member.builder().id(2L).name("머스크").level(Level.WORM).borrowCount(3).build());
-        put(3L, Member.builder().id(3L).name("트럼프").level(Level.LIBRARIAN).borrowCount(5).build());
-    }};
-
-    @Override
-    public Member findById(long memberId) {
-        return members.get(memberId);
-    }
-}
diff --git a/src/main/java/com/study/bookcafe/domain/Member.java b/src/main/java/com/study/bookcafe/domain/Member.java
index d6e839b..31266cc 100644
--- a/src/main/java/com/study/bookcafe/domain/Member.java
+++ b/src/main/java/com/study/bookcafe/domain/Member.java
@@ -27,16 +27,16 @@ public boolean canBorrow() {
         return this.getLevel().isBookBorrowCountLeft(getBorrowCount());
     }
 
-    public List<Borrow> borrowBook(List<Book> bookList) {
-        List<Borrow> borrowList = new ArrayList<>();
+    public List<Borrow> borrowBook(List<Book> books) {
+        List<Borrow> borrows = new ArrayList<>();
 
         // 회원이 대출 가능한 상태 확인
         if(!this.canBorrow()) {
-            return borrowList;
+            return borrows;
         }
 
         // 대출 가능한 도서만 목록에 담기
-        return bookList.stream()
+        return books.stream()
                 .filter(Book::canBorrow)
                 .map(book -> new Borrow(this, book, LocalDateTime.now()))
                 .toList();
diff --git a/src/main/java/com/study/bookcafe/mapper/MemberMapper.java b/src/main/java/com/study/bookcafe/mapper/MemberMapper.java
index 615830a..cda5995 100644
--- a/src/main/java/com/study/bookcafe/mapper/MemberMapper.java
+++ b/src/main/java/com/study/bookcafe/mapper/MemberMapper.java
@@ -19,7 +19,7 @@ public interface MemberMapper {
     @Mapping(target = "name", source = "name")
     @Mapping(target = "level", source = "level")
     @Mapping(target = "borrowCount", source = "borrowCount")
-        // Member -> MemberDto
+    // Member -> MemberDto
     MemberDto toMemberDto(Member member);
 
     @Named("MemberDtoToMember")
diff --git a/src/main/java/com/study/bookcafe/dao/BookRepository.java b/src/main/java/com/study/bookcafe/repository/BookRepository.java
similarity index 64%
rename from src/main/java/com/study/bookcafe/dao/BookRepository.java
rename to src/main/java/com/study/bookcafe/repository/BookRepository.java
index 6fe945e..7b29044 100644
--- a/src/main/java/com/study/bookcafe/dao/BookRepository.java
+++ b/src/main/java/com/study/bookcafe/repository/BookRepository.java
@@ -1,4 +1,4 @@
-package com.study.bookcafe.dao;
+package com.study.bookcafe.repository;
 
 import com.study.bookcafe.domain.Book;
 
@@ -7,5 +7,5 @@
 
 public interface BookRepository {
     Book findById(long bookId);
-    List<Book> findByIdList(Collection<Long> bookIds);
+    List<Book> findByIds(Collection<Long> bookIds);
 }
diff --git a/src/main/java/com/study/bookcafe/dao/BorrowRepository.java b/src/main/java/com/study/bookcafe/repository/BorrowRepository.java
similarity index 86%
rename from src/main/java/com/study/bookcafe/dao/BorrowRepository.java
rename to src/main/java/com/study/bookcafe/repository/BorrowRepository.java
index 02fa92f..998f3e2 100644
--- a/src/main/java/com/study/bookcafe/dao/BorrowRepository.java
+++ b/src/main/java/com/study/bookcafe/repository/BorrowRepository.java
@@ -1,4 +1,4 @@
-package com.study.bookcafe.dao;
+package com.study.bookcafe.repository;
 
 import com.study.bookcafe.domain.Borrow;
 
diff --git a/src/main/java/com/study/bookcafe/repository/GeneralMemberRepository.java b/src/main/java/com/study/bookcafe/repository/GeneralMemberRepository.java
new file mode 100644
index 0000000..debf484
--- /dev/null
+++ b/src/main/java/com/study/bookcafe/repository/GeneralMemberRepository.java
@@ -0,0 +1,32 @@
+package com.study.bookcafe.repository;
+
+import com.study.bookcafe.domain.Level;
+import com.study.bookcafe.domain.Member;
+import com.study.bookcafe.entity.MemberEntity;
+import com.study.bookcafe.mapper.MemberMapper;
+import org.springframework.stereotype.Repository;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@Repository
+public class GeneralMemberRepository implements MemberRepository {
+
+    private final MemberMapper memberMapper;
+
+    public GeneralMemberRepository(MemberMapper memberMapper) {
+        this.memberMapper = memberMapper;
+    }
+
+    Map<Long, MemberEntity> members = new HashMap<>(){{
+        put(1L, MemberEntity.builder().id(1L).name("슈카").level(Level.BASIC).borrowCount(0).build());
+        put(2L, MemberEntity.builder().id(2L).name("머스크").level(Level.WORM).borrowCount(3).build());
+        put(3L, MemberEntity.builder().id(3L).name("트럼프").level(Level.LIBRARIAN).borrowCount(5).build());
+    }};
+
+    @Override
+    public Member findById(long memberId) {
+        MemberEntity memberEntity = members.get(memberId);
+        return memberMapper.toMember(memberEntity);
+    }
+}
diff --git a/src/main/java/com/study/bookcafe/dao/MemberRepository.java b/src/main/java/com/study/bookcafe/repository/MemberRepository.java
similarity index 75%
rename from src/main/java/com/study/bookcafe/dao/MemberRepository.java
rename to src/main/java/com/study/bookcafe/repository/MemberRepository.java
index ffc1ba3..fb0c345 100644
--- a/src/main/java/com/study/bookcafe/dao/MemberRepository.java
+++ b/src/main/java/com/study/bookcafe/repository/MemberRepository.java
@@ -1,4 +1,4 @@
-package com.study.bookcafe.dao;
+package com.study.bookcafe.repository;
 
 import com.study.bookcafe.domain.Member;
 
diff --git a/src/main/java/com/study/bookcafe/dao/TestBookRepository.java b/src/main/java/com/study/bookcafe/repository/TestBookRepository.java
similarity index 93%
rename from src/main/java/com/study/bookcafe/dao/TestBookRepository.java
rename to src/main/java/com/study/bookcafe/repository/TestBookRepository.java
index 3f8c7ae..1f9535d 100644
--- a/src/main/java/com/study/bookcafe/dao/TestBookRepository.java
+++ b/src/main/java/com/study/bookcafe/repository/TestBookRepository.java
@@ -1,4 +1,4 @@
-package com.study.bookcafe.dao;
+package com.study.bookcafe.repository;
 
 import com.study.bookcafe.domain.Book;
 import com.study.bookcafe.domain.Inventory;
@@ -35,7 +35,7 @@ public Book findById(long bookId) {
     }
 
     @Override
-    public List<Book> findByIdList(Collection<Long> bookIds) {
+    public List<Book> findByIds(Collection<Long> bookIds) {
         List<BookEntity> bookEntities = bookIds.stream()
                 .filter(id -> books.containsKey(id))
                 .map(id -> books.get(id)).toList();
diff --git a/src/main/java/com/study/bookcafe/dao/TestBorrowRepository.java b/src/main/java/com/study/bookcafe/repository/TestBorrowRepository.java
similarity index 97%
rename from src/main/java/com/study/bookcafe/dao/TestBorrowRepository.java
rename to src/main/java/com/study/bookcafe/repository/TestBorrowRepository.java
index 466fedb..35690df 100644
--- a/src/main/java/com/study/bookcafe/dao/TestBorrowRepository.java
+++ b/src/main/java/com/study/bookcafe/repository/TestBorrowRepository.java
@@ -1,4 +1,4 @@
-package com.study.bookcafe.dao;
+package com.study.bookcafe.repository;
 
 import com.study.bookcafe.domain.Borrow;
 import com.study.bookcafe.entity.BookEntity;
diff --git a/src/main/java/com/study/bookcafe/service/BookService.java b/src/main/java/com/study/bookcafe/service/BookService.java
index 17b254f..49f8092 100644
--- a/src/main/java/com/study/bookcafe/service/BookService.java
+++ b/src/main/java/com/study/bookcafe/service/BookService.java
@@ -10,5 +10,5 @@ public interface BookService {
     Book findById(long bookId);
 
     // 도서 목록 조회 (id list)
-    List<Book> findByIdList(Collection<Long> bookIds);
+    List<Book> findByIds(Collection<Long> bookIds);
 }
diff --git a/src/main/java/com/study/bookcafe/service/BookServiceImpl.java b/src/main/java/com/study/bookcafe/service/BookServiceImpl.java
index 5d5d57f..b2283f9 100644
--- a/src/main/java/com/study/bookcafe/service/BookServiceImpl.java
+++ b/src/main/java/com/study/bookcafe/service/BookServiceImpl.java
@@ -1,6 +1,6 @@
 package com.study.bookcafe.service;
 
-import com.study.bookcafe.dao.BookRepository;
+import com.study.bookcafe.repository.BookRepository;
 import com.study.bookcafe.domain.Book;
 import org.springframework.stereotype.Service;
 
@@ -34,7 +34,7 @@ public Book findById(long bookId) {
      * @return 도서 목록
      */
     @Override
-    public List<Book> findByIdList(Collection<Long> bookIds) {
-        return bookRepository.findByIdList(bookIds);
+    public List<Book> findByIds(Collection<Long> bookIds) {
+        return bookRepository.findByIds(bookIds);
     }
 }
diff --git a/src/main/java/com/study/bookcafe/service/BorrowServiceImpl.java b/src/main/java/com/study/bookcafe/service/BorrowServiceImpl.java
index f25de28..cba4285 100644
--- a/src/main/java/com/study/bookcafe/service/BorrowServiceImpl.java
+++ b/src/main/java/com/study/bookcafe/service/BorrowServiceImpl.java
@@ -1,6 +1,6 @@
 package com.study.bookcafe.service;
 
-import com.study.bookcafe.dao.BorrowRepository;
+import com.study.bookcafe.repository.BorrowRepository;
 import com.study.bookcafe.domain.Borrow;
 import org.springframework.stereotype.Service;
 
diff --git a/src/main/java/com/study/bookcafe/service/MemberServiceImpl.java b/src/main/java/com/study/bookcafe/service/MemberServiceImpl.java
index 4e37722..3b7f70a 100644
--- a/src/main/java/com/study/bookcafe/service/MemberServiceImpl.java
+++ b/src/main/java/com/study/bookcafe/service/MemberServiceImpl.java
@@ -1,6 +1,6 @@
 package com.study.bookcafe.service;
 
-import com.study.bookcafe.dao.MemberRepository;
+import com.study.bookcafe.repository.MemberRepository;
 import com.study.bookcafe.domain.Book;
 import com.study.bookcafe.domain.Borrow;
 import com.study.bookcafe.domain.Member;
@@ -43,7 +43,7 @@ public Member findById(long memberId) {
     @Override
     public List<Borrow> borrowBook(long memberId, Collection<Long> bookIds) {
         Member member = findById(memberId);
-        List<Book> books = bookService.findByIdList(bookIds);
+        List<Book> books = bookService.findByIds(bookIds);
         List<Borrow> borrows = member.borrowBook(books);
 
         if(borrows.isEmpty()) return borrows;
diff --git a/src/test/java/com/study/bookcafe/book/MapperTest.java b/src/test/java/com/study/bookcafe/book/MapperTest.java
index c4aaf70..5ceb18f 100644
--- a/src/test/java/com/study/bookcafe/book/MapperTest.java
+++ b/src/test/java/com/study/bookcafe/book/MapperTest.java
@@ -14,6 +14,8 @@
 import java.sql.Date;
 import java.time.LocalDate;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class MapperTest {
     private final BookMapper bookMapper = Mappers.getMapper(BookMapper.class);
     private final Gson gson = JsonHelper.getGson();
@@ -27,7 +29,7 @@ public void checkMapperBookToBookDto() {
                 .price(35000).inventory(new Inventory(5)).build();
         BookDto bookDto = bookMapper.toBookDto(book);
 
-        System.out.println(gson.toJson(bookDto));
+        assertThat(bookDto).isNotNull();
     }
 
     @Test
@@ -39,7 +41,7 @@ public void checkMapperBookDtoToBook() {
                 .price(35000).inventory(new Inventory(5)).build();
         Book book = bookMapper.toBook(bookDto);
 
-        System.out.println(gson.toJson(book));
+        assertThat(book).isNotNull();
     }
 
     @Test
@@ -51,7 +53,7 @@ public void checkMapperBookToBookEntity() {
                 .price(35000).inventory(new Inventory(5)).build();
         BookEntity bookEntity = bookMapper.toBookEntity(book);
 
-        System.out.println(gson.toJson(bookEntity));
+        assertThat(bookEntity).isNotNull();
     }
 
     @Test
@@ -63,6 +65,6 @@ public void checkMapperBookEntityToBook() {
                 .price(35000).inventory(new Inventory(5)).build();
         Book book = bookMapper.toBook(bookEntity);
 
-        System.out.println(gson.toJson(book));
+        assertThat(book).isNotNull();
     }
 }
diff --git a/src/test/java/com/study/bookcafe/borrow/BorrowTest.java b/src/test/java/com/study/bookcafe/borrow/BorrowTest.java
index 9c67208..a8df752 100644
--- a/src/test/java/com/study/bookcafe/borrow/BorrowTest.java
+++ b/src/test/java/com/study/bookcafe/borrow/BorrowTest.java
@@ -1,12 +1,17 @@
 package com.study.bookcafe.borrow;
 
+import com.google.gson.Gson;
+import com.study.bookcafe.common.JsonHelper;
 import com.study.bookcafe.domain.Borrow;
+import com.study.bookcafe.entity.BorrowEntity;
+import com.study.bookcafe.mapper.BorrowMapper;
 import com.study.bookcafe.service.*;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.context.SpringBootTest;
 
+import java.time.LocalDateTime;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.*;
@@ -16,6 +21,10 @@ public class BorrowTest {
 
     @Autowired
     private MemberService memberService;
+    @Autowired
+    private BorrowMapper borrowMapper;
+
+    private final Gson gson = JsonHelper.getGson();
 
     @Test
     @DisplayName("회원이 도서를 대출한다.")
@@ -24,7 +33,6 @@ public void testBorrowBook() {
         List<Borrow> borrows1 = memberService.borrowBook(1, List.of(1L));
         List<Borrow> borrows2 = memberService.borrowBook(3, List.of(2L));
 
-//        assertThat(Borrow.successBorrow(borrow1)).isTrue();
         borrows1.forEach(borrow -> assertThat(Borrow.successBorrow(borrow)).isEqualTo(true));
         borrows2.forEach(borrow -> assertThat(Borrow.successBorrow(borrow)).isEqualTo(true));
 
diff --git a/src/test/java/com/study/bookcafe/member/MapperTest.java b/src/test/java/com/study/bookcafe/member/MapperTest.java
index b5195ac..eec647b 100644
--- a/src/test/java/com/study/bookcafe/member/MapperTest.java
+++ b/src/test/java/com/study/bookcafe/member/MapperTest.java
@@ -11,6 +11,8 @@
 import org.junit.jupiter.api.Test;
 import org.mapstruct.factory.Mappers;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class MapperTest {
     private final MemberMapper memberMapper = Mappers.getMapper(MemberMapper.class);
     private final Gson gson = JsonHelper.getGson();
@@ -21,7 +23,7 @@ public void checkMapperMemberToMemberDto() {
         MemberDto memberDto = MemberDto.builder().id(2).name("슈카").level(Level.WORM).borrowCount(5).build();
         Member member = memberMapper.toMember(memberDto);
 
-        System.out.println(gson.toJson(member));
+        assertThat(member).isNotNull();
     }
 
     @Test
@@ -30,7 +32,7 @@ public void checkMapperMemberDtoToMember() {
         Member member = Member.builder().id(1).name("김도훈").level(Level.BASIC).borrowCount(2).build();
         MemberDto memberDto = memberMapper.toMemberDto(member);
 
-        System.out.println(gson.toJson(memberDto));
+        assertThat(memberDto).isNotNull();
     }
 
     @Test
@@ -39,7 +41,7 @@ public void checkMapperMemberToMemberEntity() {
         Member member = Member.builder().id(1).name("트럼프").level(Level.LIBRARIAN).borrowCount(7).build();
         MemberEntity memberEntity = memberMapper.toMemberEntity(member);
 
-        System.out.println(gson.toJson(memberEntity));
+        assertThat(memberEntity).isNotNull();
     }
 
     @Test
@@ -48,6 +50,6 @@ public void checkMapperMemberEntityToMember() {
         MemberEntity memberEntity = MemberEntity.builder().id(3).name("머스크").level(Level.WORM).borrowCount(2).build();
         Member member = memberMapper.toMember(memberEntity);
 
-        System.out.println(gson.toJson(member));
+        assertThat(member).isNotNull();
     }
 }