diff --git a/src/main/java/com/potatocake/everymoment/controller/FriendController.java b/src/main/java/com/potatocake/everymoment/controller/FriendController.java
index d108739..8fb3f75 100644
--- a/src/main/java/com/potatocake/everymoment/controller/FriendController.java
+++ b/src/main/java/com/potatocake/everymoment/controller/FriendController.java
@@ -45,10 +45,9 @@ public ResponseEntity<SuccessResponse<OneFriendDiariesResponse>> getOneFriendDia
     @GetMapping("/friends")
     public ResponseEntity<SuccessResponse<FriendListResponse>> getFriendList(
             @RequestParam(required = false) String nickname,
-            @RequestParam(required = false) String email,
             @RequestParam(defaultValue = "0") int key,
             @RequestParam(defaultValue = "10") int size) {
-        FriendListResponse friendList = friendService.getFriendList(nickname, email, key, size);
+        FriendListResponse friendList = friendService.getFriendList(nickname, key, size);
         SuccessResponse<FriendListResponse> response = SuccessResponse.<FriendListResponse>builder()
                 .code(HttpStatus.OK.value())
                 .message("success")
diff --git a/src/main/java/com/potatocake/everymoment/controller/MemberController.java b/src/main/java/com/potatocake/everymoment/controller/MemberController.java
index 3d255dc..e680a93 100644
--- a/src/main/java/com/potatocake/everymoment/controller/MemberController.java
+++ b/src/main/java/com/potatocake/everymoment/controller/MemberController.java
@@ -16,6 +16,7 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.util.StringUtils;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -32,7 +33,7 @@ public class MemberController {
 
     private final MemberService memberService;
 
-    @Operation(summary = "로그인", description = "이메일과 닉네임으로 로그인합니다.")
+    @Operation(summary = "로그인", description = "회원 번호와 닉네임으로 로그인합니다.")
 //    @ApiResponses(value = {
 //            @ApiResponse(responseCode = "200", description = "로그인 성공",
 //                    content = @Content(schema = @Schema(implementation = JwtResponse.class))),
@@ -49,11 +50,10 @@ public ResponseEntity<SuccessResponse<JwtResponse>> login(@RequestBody MemberLog
     @GetMapping
     public ResponseEntity<SuccessResponse<MemberSearchResponse>> searchMembers(
             @RequestParam(required = false) String nickname,
-            @RequestParam(required = false) String email,
             @RequestParam(required = false) Long key,
             @RequestParam(defaultValue = "10") int size) {
 
-        MemberSearchResponse response = memberService.searchMembers(nickname, email, key, size);
+        MemberSearchResponse response = memberService.searchMembers(nickname, key, size);
 
         return ResponseEntity.ok()
                 .body(SuccessResponse.ok(response));
@@ -88,6 +88,14 @@ public ResponseEntity<SuccessResponse<Void>> updateMemberInfo(@AuthenticationPri
                 .body(SuccessResponse.ok());
     }
 
+    @DeleteMapping
+    public ResponseEntity<SuccessResponse<Void>> deleteMember(@AuthenticationPrincipal MemberDetails memberDetails) {
+        memberService.deleteMember(memberDetails.getId());
+
+        return ResponseEntity.ok()
+                .body(SuccessResponse.ok());
+    }
+
     private void validateProfileUpdate(MultipartFile profileImage, String nickname) {
         if (profileImage == null && !StringUtils.hasText(nickname)) {
             throw new GlobalException(ErrorCode.INFO_REQUIRED);
diff --git a/src/main/java/com/potatocake/everymoment/dto/request/MemberLoginRequest.java b/src/main/java/com/potatocake/everymoment/dto/request/MemberLoginRequest.java
index 005375b..f59d229 100644
--- a/src/main/java/com/potatocake/everymoment/dto/request/MemberLoginRequest.java
+++ b/src/main/java/com/potatocake/everymoment/dto/request/MemberLoginRequest.java
@@ -5,7 +5,7 @@
 @Getter
 public class MemberLoginRequest {
 
-    private String email;
+    private Long number;
     private String nickname;
 
 }
diff --git a/src/main/java/com/potatocake/everymoment/dto/response/MemberDetailResponse.java b/src/main/java/com/potatocake/everymoment/dto/response/MemberDetailResponse.java
index 0180208..9abbac6 100644
--- a/src/main/java/com/potatocake/everymoment/dto/response/MemberDetailResponse.java
+++ b/src/main/java/com/potatocake/everymoment/dto/response/MemberDetailResponse.java
@@ -10,6 +10,5 @@ public class MemberDetailResponse {
     private Long id;
     private String profileImageUrl;
     private String nickname;
-    private String email;
 
 }
diff --git a/src/main/java/com/potatocake/everymoment/entity/Member.java b/src/main/java/com/potatocake/everymoment/entity/Member.java
index fa657f4..0142578 100644
--- a/src/main/java/com/potatocake/everymoment/entity/Member.java
+++ b/src/main/java/com/potatocake/everymoment/entity/Member.java
@@ -11,11 +11,15 @@
 import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
+import org.hibernate.annotations.SQLDelete;
+import org.hibernate.annotations.SQLRestriction;
 
 @Getter
 @Builder
 @AllArgsConstructor
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
+@SQLDelete(sql = "UPDATE member SET deleted = true WHERE id = ?")
+@SQLRestriction("deleted = false")
 @Entity
 public class Member extends BaseTimeEntity {
 
@@ -23,8 +27,8 @@ public class Member extends BaseTimeEntity {
     @Id
     private Long id;
 
-    @Column(nullable = false, unique = true, length = 50)
-    private String email;
+    @Column(nullable = false, unique = true)
+    private Long number;
 
     @Column(nullable = false, length = 50)
     private String nickname;
@@ -32,6 +36,9 @@ public class Member extends BaseTimeEntity {
     @Lob
     private String profileImageUrl;
 
+    @Column(nullable = false)
+    private boolean deleted = false;
+
     public void update(String nickname, String profileImageUrl) {
         this.nickname = nickname;
         this.profileImageUrl = profileImageUrl;
diff --git a/src/main/java/com/potatocake/everymoment/exception/ValidationErrorMessage.java b/src/main/java/com/potatocake/everymoment/exception/ValidationErrorMessage.java
index 695c825..71dcdf7 100644
--- a/src/main/java/com/potatocake/everymoment/exception/ValidationErrorMessage.java
+++ b/src/main/java/com/potatocake/everymoment/exception/ValidationErrorMessage.java
@@ -4,13 +4,4 @@ public class ValidationErrorMessage {
 
     public static final String VALIDATION_ERROR = "입력 데이터의 유효성을 검사하던 중 문제가 발생했습니다.";
 
-    public static final String EMAIL_FORMAT_INVALID = "올바른 이메일 형식을 입력해 주세요.";
-    public static final String EMAIL_NOT_BLANK = "이메일은 필수 입력 값입니다.";
-    public static final String EMAIL_SIZE_INVALID = "이메일은 50자 이하여야 합니다.";
-
-    public static final String NICKNAME_NOT_BLANK = "닉네임을 입력해 주세요.";
-    public static final String NICKNAME_SIZE_INVALID = "닉네임은 50자 이하여야 합니다.";
-
-    public static final String CATEGORY_NAME_NOT_BLANK = "카테고리명을 입력해 주세요.";
-
 }
diff --git a/src/main/java/com/potatocake/everymoment/repository/MemberRepository.java b/src/main/java/com/potatocake/everymoment/repository/MemberRepository.java
index 03b501c..135e588 100644
--- a/src/main/java/com/potatocake/everymoment/repository/MemberRepository.java
+++ b/src/main/java/com/potatocake/everymoment/repository/MemberRepository.java
@@ -9,11 +9,10 @@
 
 public interface MemberRepository extends JpaRepository<Member, Long> {
 
-    Optional<Member> findByEmail(String email);
+    Optional<Member> findByNumber(Long number);
 
-    boolean existsByEmail(String email);
+    boolean existsByNumber(Long number);
 
-    Window<Member> findByNicknameContainingAndEmailContaining(String nickname, String email, ScrollPosition position,
-                                                              Pageable pageable);
+    Window<Member> findByNicknameContaining(String nickname, ScrollPosition position, Pageable pageable);
 
 }
diff --git a/src/main/java/com/potatocake/everymoment/security/MemberAuthenticationService.java b/src/main/java/com/potatocake/everymoment/security/MemberAuthenticationService.java
index c788d24..340e981 100644
--- a/src/main/java/com/potatocake/everymoment/security/MemberAuthenticationService.java
+++ b/src/main/java/com/potatocake/everymoment/security/MemberAuthenticationService.java
@@ -16,8 +16,8 @@ public class MemberAuthenticationService implements UserDetailsService {
     private final MemberRepository memberRepository;
 
     @Override
-    public UserDetails loadUserByUsername(String email) throws UsernameNotFoundException {
-        Member member = memberRepository.findByEmail(email)
+    public UserDetails loadUserByUsername(String number) throws UsernameNotFoundException {
+        Member member = memberRepository.findByNumber(Long.valueOf(number))
                 .orElseThrow(() -> new UsernameNotFoundException(ErrorCode.LOGIN_FAILED.getMessage()));
 
         return new MemberDetails(member);
diff --git a/src/main/java/com/potatocake/everymoment/security/MemberDetails.java b/src/main/java/com/potatocake/everymoment/security/MemberDetails.java
index c93d8e0..b4fedca 100644
--- a/src/main/java/com/potatocake/everymoment/security/MemberDetails.java
+++ b/src/main/java/com/potatocake/everymoment/security/MemberDetails.java
@@ -31,7 +31,7 @@ public String getPassword() {
 
     @Override
     public String getUsername() {
-        return member.getEmail();
+        return String.valueOf(member.getNumber());
     }
 
     public Long getId() {
diff --git a/src/main/java/com/potatocake/everymoment/security/filter/LoginFilter.java b/src/main/java/com/potatocake/everymoment/security/filter/LoginFilter.java
index 18760f8..53a2951 100644
--- a/src/main/java/com/potatocake/everymoment/security/filter/LoginFilter.java
+++ b/src/main/java/com/potatocake/everymoment/security/filter/LoginFilter.java
@@ -53,12 +53,14 @@ public Authentication attemptAuthentication(HttpServletRequest request, HttpServ
 
         MemberLoginRequest loginRequest = getLoginRequest(request);
 
-        if (loginRequest.getEmail() != null && loginRequest.getNickname() != null) {
+        if (loginRequest.getNumber() == null || loginRequest.getNickname() == null) {
+            throw new AuthenticationServiceException("Invalid login request");
+        } else {
             registerIfNotExists(loginRequest);
         }
 
         UsernamePasswordAuthenticationToken authRequest = UsernamePasswordAuthenticationToken.unauthenticated(
-                loginRequest.getEmail(), DEFAULT_PASSWORD);
+                String.valueOf(loginRequest.getNumber()), DEFAULT_PASSWORD);
 
         return authenticationManager.authenticate(authRequest);
     }
@@ -117,14 +119,14 @@ private ErrorResponse getErrorResponse(ErrorCode loginFailed) {
     }
 
     private void registerIfNotExists(MemberLoginRequest loginRequest) {
-        if (!memberRepository.existsByEmail(loginRequest.getEmail())) {
+        if (!memberRepository.existsByNumber(loginRequest.getNumber())) {
             memberRepository.save(getMember(loginRequest));
         }
     }
 
     private Member getMember(MemberLoginRequest loginRequest) {
         Member member = Member.builder()
-                .email(loginRequest.getEmail())
+                .number(loginRequest.getNumber())
                 .nickname(loginRequest.getNickname())
                 .build();
 
diff --git a/src/main/java/com/potatocake/everymoment/service/FriendService.java b/src/main/java/com/potatocake/everymoment/service/FriendService.java
index d252170..ba78771 100644
--- a/src/main/java/com/potatocake/everymoment/service/FriendService.java
+++ b/src/main/java/com/potatocake/everymoment/service/FriendService.java
@@ -51,8 +51,9 @@ public OneFriendDiariesResponse OneFriendDiariesResponse(Long id, LocalDate date
 
         Pageable pageable = PageRequest.of(key, size);
 
-        Page<Diary> diaries = diaryRepository.findAll(DiarySpecification.filterDiaries(null, null, date, null, null, null)
-                .and((root, query, builder) -> builder.equal(root.get("memberId").get("id"), id)), pageable);
+        Page<Diary> diaries = diaryRepository.findAll(
+                DiarySpecification.filterDiaries(null, null, date, null, null, null)
+                        .and((root, query, builder) -> builder.equal(root.get("memberId").get("id"), id)), pageable);
 
         List<FriendDiarySimpleResponse> diaryList = diaries.getContent().stream()
                 .map(this::convertToFriendDiariesResponseDTO)
@@ -68,7 +69,7 @@ public OneFriendDiariesResponse OneFriendDiariesResponse(Long id, LocalDate date
 
     //내 친구 목록 조회
     @Transactional(readOnly = true)
-    public FriendListResponse getFriendList(String nickname, String email, int key, int size) {
+    public FriendListResponse getFriendList(String nickname, int key, int size) {
         Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
         MemberDetails memberDetails = (MemberDetails) authentication.getPrincipal();
         Member currentMember = memberDetails.getMember();
@@ -76,7 +77,7 @@ public FriendListResponse getFriendList(String nickname, String email, int key,
 
         Pageable pageable = PageRequest.of(key, size);
 
-        Specification<Friend> spec = FriendSpecification.filterFriends(memberId, nickname, email)
+        Specification<Friend> spec = FriendSpecification.filterFriends(memberId, nickname)
                 .and((root, query, builder) -> builder.equal(root.get("memberId").get("id"), memberId));
 
         Page<Friend> friends = friendRepository.findAll(spec, pageable);
@@ -147,7 +148,7 @@ private FriendDiarySimpleResponse convertToFriendDiariesResponseDTO(Diary savedD
     }
 
     //친구 프로필 DTO 변환
-    private FriendProfileResponse convertToFriendProfileResponseDTO(Friend friend){
+    private FriendProfileResponse convertToFriendProfileResponseDTO(Friend friend) {
         Member friendMember = friend.getFriendId();
         return FriendProfileResponse.builder()
                 .id(friendMember.getId())
diff --git a/src/main/java/com/potatocake/everymoment/service/FriendSpecification.java b/src/main/java/com/potatocake/everymoment/service/FriendSpecification.java
index 6d193f1..71b9451 100644
--- a/src/main/java/com/potatocake/everymoment/service/FriendSpecification.java
+++ b/src/main/java/com/potatocake/everymoment/service/FriendSpecification.java
@@ -10,7 +10,7 @@
 import org.springframework.data.jpa.domain.Specification;
 
 public class FriendSpecification {
-    public static Specification<Friend> filterFriends(Long memberId, String nickname, String email) {
+    public static Specification<Friend> filterFriends(Long memberId, String nickname) {
         return (Root<Friend> root, CriteriaQuery<?> query, CriteriaBuilder builder) -> {
             Predicate predicate = builder.conjunction();
 
@@ -21,11 +21,6 @@ public static Specification<Friend> filterFriends(Long memberId, String nickname
                 predicate = builder.and(predicate, builder.like(friendJoin.get("nickname"), "%" + nickname + "%"));
             }
 
-            if (email != null) {
-                Join<Friend, Member> friendJoin = root.join("friendId");
-                predicate = builder.and(predicate, builder.like(friendJoin.get("email"), "%" + email + "%"));
-            }
-
             return predicate;
         };
     }
diff --git a/src/main/java/com/potatocake/everymoment/service/MemberService.java b/src/main/java/com/potatocake/everymoment/service/MemberService.java
index f93bfef..4ac4d15 100644
--- a/src/main/java/com/potatocake/everymoment/service/MemberService.java
+++ b/src/main/java/com/potatocake/everymoment/service/MemberService.java
@@ -31,8 +31,8 @@ public class MemberService {
     private final S3FileUploader s3FileUploader;
 
     @Transactional(readOnly = true)
-    public MemberSearchResponse searchMembers(String nickname, String email, Long key, int size) {
-        Window<Member> window = fetchMemberWindow(nickname, email, key, size);
+    public MemberSearchResponse searchMembers(String nickname, Long key, int size) {
+        Window<Member> window = fetchMemberWindow(nickname, key, size);
         List<MemberResponse> members = convertToMemberResponses(window.getContent());
         Long nextKey = pagingUtil.getNextKey(window, Member::getId);
 
@@ -51,7 +51,6 @@ public MemberDetailResponse getMyInfo(Long memberId) {
                 .id(member.getId())
                 .profileImageUrl(member.getProfileImageUrl())
                 .nickname(member.getNickname())
-                .email(member.getEmail())
                 .build();
     }
 
@@ -76,15 +75,20 @@ public void updateMemberInfo(Long id, MultipartFile profileImage, String nicknam
         member.update(nickname, profileImageUrl);
     }
 
-    private Window<Member> fetchMemberWindow(String nickname, String email, Long key, int size) {
+    public void deleteMember(Long memberId) {
+        Member member = memberRepository.findById(memberId)
+                .orElseThrow(() -> new GlobalException(ErrorCode.MEMBER_NOT_FOUND));
+        
+        memberRepository.delete(member);
+    }
+
+    private Window<Member> fetchMemberWindow(String nickname, Long key, int size) {
         ScrollPosition scrollPosition = pagingUtil.createScrollPosition(key);
         Pageable pageable = pagingUtil.createPageable(size, ASC);
 
         String searchNickname = (nickname == null) ? "" : nickname;
-        String searchEmail = (email == null) ? "" : email;
 
-        return memberRepository.findByNicknameContainingAndEmailContaining(searchNickname, searchEmail, scrollPosition,
-                pageable);
+        return memberRepository.findByNicknameContaining(searchNickname, scrollPosition, pageable);
     }
 
     private List<MemberResponse> convertToMemberResponses(List<Member> members) {
diff --git a/src/test/java/com/potatocake/everymoment/controller/MemberControllerTest.java b/src/test/java/com/potatocake/everymoment/controller/MemberControllerTest.java
index 02ad1a3..c1a1ad1 100644
--- a/src/test/java/com/potatocake/everymoment/controller/MemberControllerTest.java
+++ b/src/test/java/com/potatocake/everymoment/controller/MemberControllerTest.java
@@ -47,17 +47,15 @@ class MemberControllerTest {
     void should_SearchMembers_When_ValidInput() throws Exception {
         // given
         String nickname = "testUser";
-        String email = "test@test.com";
         Long key = 1L;
         int size = 10;
         MemberSearchResponse response = MemberSearchResponse.builder().build();
 
-        given(memberService.searchMembers(nickname, email, key, size)).willReturn(response);
+        given(memberService.searchMembers(nickname, key, size)).willReturn(response);
 
         // when
         ResultActions result = mockMvc.perform(get("/api/members")
                 .param("nickname", nickname)
-                .param("email", email)
                 .param("key", key.toString())
                 .param("size", String.valueOf(size)));
 
@@ -67,7 +65,7 @@ void should_SearchMembers_When_ValidInput() throws Exception {
                 .andExpect(jsonPath("$.code").value(200))
                 .andExpect(jsonPath("$.message").value("success"));
 
-        then(memberService).should().searchMembers(nickname, email, key, size);
+        then(memberService).should().searchMembers(nickname, key, size);
     }
 
     @Test
@@ -75,7 +73,7 @@ void should_SearchMembers_When_ValidInput() throws Exception {
     void should_ReturnMyInfo_When_ValidMember() throws Exception {
         // given
         Long memberId = 1L;
-        MemberDetails memberDetails = createMemberDetails(memberId, "test@example.com", "test");
+        MemberDetails memberDetails = createMemberDetails(memberId, 1234L, "test");
 
         MemberDetailResponse response = MemberDetailResponse.builder().build();
         given(memberService.getMyInfo(memberId)).willReturn(response);
@@ -120,7 +118,7 @@ void should_ReturnMemberInfo_When_ValidMemberId() throws Exception {
     void should_UpdateMemberInfo_When_ValidInput() throws Exception {
         // given
         Long memberId = 1L;
-        MemberDetails memberDetails = createMemberDetails(memberId, "test@example.com", "test");
+        MemberDetails memberDetails = createMemberDetails(memberId, 1234L, "test");
 
         MockMultipartFile profileImage = new MockMultipartFile("profileImage", "image.png", "image/png", new byte[]{});
         String nickname = "newNickname";
@@ -154,16 +152,16 @@ void should_ThrowException_When_ProfileImageAndNicknameAreMissing() throws Excep
         then(memberService).shouldHaveNoInteractions();
     }
 
-    private Member createMember(Long memberId, String email, String nickname) {
+    private Member createMember(Long memberId, Long number, String nickname) {
         return Member.builder()
                 .id(memberId)
-                .email(email)
+                .number(number)
                 .nickname(nickname)
                 .build();
     }
 
-    private MemberDetails createMemberDetails(Long memberId, String email, String nickname) {
-        Member member = createMember(memberId, email, nickname);
+    private MemberDetails createMemberDetails(Long memberId, Long number, String nickname) {
+        Member member = createMember(memberId, number, nickname);
         return new MemberDetails(member);
     }
 
diff --git a/src/test/java/com/potatocake/everymoment/repository/MemberRepositoryTest.java b/src/test/java/com/potatocake/everymoment/repository/MemberRepositoryTest.java
index 4cb1bd8..2e72d9e 100644
--- a/src/test/java/com/potatocake/everymoment/repository/MemberRepositoryTest.java
+++ b/src/test/java/com/potatocake/everymoment/repository/MemberRepositoryTest.java
@@ -19,58 +19,57 @@ class MemberRepositoryTest {
     private MemberRepository memberRepository;
 
     @Test
-    @DisplayName("이메일로 회원을 성공적으로 조회한다.")
-    void should_FindMemberByEmail_When_EmailExists() {
+    @DisplayName("회원 번호로 회원을 성공적으로 조회한다.")
+    void should_FindMemberByNumber_When_NumberExists() {
         // given
-        String email = "test@test.com";
+        Long number = 1234L;
         memberRepository.save(Member.builder()
-                .email(email)
+                .number(number)
                 .nickname("testUser")
                 .build());
 
         // when
-        Optional<Member> foundMember = memberRepository.findByEmail(email);
+        Optional<Member> foundMember = memberRepository.findByNumber(number);
 
         // then
         assertThat(foundMember).isPresent();
-        assertThat(foundMember.get().getEmail()).isEqualTo(email);
+        assertThat(foundMember.get().getNumber()).isEqualTo(number);
     }
 
     @Test
-    @DisplayName("이메일이 존재하는지 확인한다.")
-    void should_ReturnTrue_When_EmailExists() {
+    @DisplayName("회원 번호가 존재하는지 확인한다.")
+    void should_ReturnTrue_When_NumberExists() {
         // given
-        String email = "test@test.com";
+        Long number = 1234L;
         memberRepository.save(Member.builder()
-                .email(email)
+                .number(number)
                 .nickname("testUser")
                 .build());
 
         // when
-        boolean exists = memberRepository.existsByEmail(email);
+        boolean exists = memberRepository.existsByNumber(number);
 
         // then
         assertThat(exists).isTrue();
     }
 
     @Test
-    @DisplayName("닉네임과 이메일을 포함하여 스크롤 방식으로 회원 목록을 조회한다.")
-    void should_FindByNicknameContainingAndEmailContaining_When_ValidScrollPosition() {
+    @DisplayName("닉네임을 포함하여 스크롤 방식으로 회원 목록을 조회한다.")
+    void should_FindByNicknameContaining_When_ValidScrollPosition() {
         // given
         String nickname = "test";
-        String email = "test";
+        Long number = 1234L;
         for (int i = 1; i <= 15; i++) {
             memberRepository.save(Member.builder()
                     .nickname(nickname + i)
-                    .email(email + i + "@test.com")
+                    .number(number + i)
                     .build());
         }
 
         // when
         ScrollPosition scrollPosition = ScrollPosition.offset();
         PageRequest pageRequest = PageRequest.of(0, 10);
-        Window<Member> window = memberRepository.findByNicknameContainingAndEmailContaining(nickname, email,
-                scrollPosition, pageRequest);
+        Window<Member> window = memberRepository.findByNicknameContaining(nickname, scrollPosition, pageRequest);
 
         // then
         assertThat(window).isNotNull();
@@ -79,15 +78,14 @@ void should_FindByNicknameContainingAndEmailContaining_When_ValidScrollPosition(
     }
 
     @Test
-    @DisplayName("닉네임과 이메일이 일치하지 않으면 빈 결과를 반환한다.")
-    void should_ReturnEmpty_When_NoMatchingNicknameAndEmail() {
+    @DisplayName("닉네임으로 검색 결과가 없다면 빈 결과를 반환한다.")
+    void should_ReturnEmpty_When_NoMatchingNickname() {
         // given
         ScrollPosition scrollPosition = ScrollPosition.offset();
         PageRequest pageRequest = PageRequest.of(0, 10);
 
         // when
-        Window<Member> window = memberRepository.findByNicknameContainingAndEmailContaining("nonexistent",
-                "nonexistent@test.com", scrollPosition, pageRequest);
+        Window<Member> window = memberRepository.findByNicknameContaining("nonexistent", scrollPosition, pageRequest);
 
         // then
         assertThat(window.getContent()).isEmpty();
diff --git a/src/test/java/com/potatocake/everymoment/service/MemberServiceTest.java b/src/test/java/com/potatocake/everymoment/service/MemberServiceTest.java
index 3c8e313..5106a5e 100644
--- a/src/test/java/com/potatocake/everymoment/service/MemberServiceTest.java
+++ b/src/test/java/com/potatocake/everymoment/service/MemberServiceTest.java
@@ -47,24 +47,23 @@ class MemberServiceTest {
     void should_ReturnMemberList_When_ValidSearchConditions() {
         // given
         String nickname = "testUser";
-        String email = "test@test.com";
         Long key = 1L;
         int size = 10;
 
         List<Member> members = List.of(Member.builder().build());
         Window<Member> window = Window.from(members, ScrollPosition::offset, false);
-        given(memberRepository.findByNicknameContainingAndEmailContaining(anyString(), anyString(), any(), any()))
+        given(memberRepository.findByNicknameContaining(anyString(), any(), any()))
                 .willReturn(window);
 
         // when
-        MemberSearchResponse result = memberService.searchMembers(nickname, email, key, size);
+        MemberSearchResponse result = memberService.searchMembers(nickname, key, size);
 
         // then
         assertThat(result).isNotNull();
         assertThat(result.getMembers()).isNotEmpty();
 
         then(memberRepository).should()
-                .findByNicknameContainingAndEmailContaining(anyString(), anyString(), any(), any());
+                .findByNicknameContaining(anyString(), any(), any());
     }
 
     @Test