diff --git a/src/main/java/com/example/hackathon/domain/user/controller/UserController.java b/src/main/java/com/example/hackathon/domain/user/controller/UserController.java
index bb03fd1..30914b1 100644
--- a/src/main/java/com/example/hackathon/domain/user/controller/UserController.java
+++ b/src/main/java/com/example/hackathon/domain/user/controller/UserController.java
@@ -4,8 +4,10 @@
 import com.example.hackathon.domain.user.dto.request.UserCreateRequest;
 import com.example.hackathon.domain.user.dto.request.ActiveTeamRequest;
 import com.example.hackathon.domain.user.dto.request.UserEmailRequest;
+import com.example.hackathon.domain.user.dto.request.UserNotificationRequest;
 import com.example.hackathon.domain.user.dto.response.UserCreateResponse;
 import com.example.hackathon.domain.user.dto.response.UserHomeResponse;
+import com.example.hackathon.domain.user.dto.response.UserResponse;
 import com.example.hackathon.domain.user.service.UserService;
 
 import com.example.hackathon.global.response.ApiResponse;
@@ -82,4 +84,21 @@ public ResponseEntity<ApiResponse<UserHomeResponse>> getHomeData(
         UserHomeResponse response = userService.getHomeData(userId);
         return ResponseEntity.ok(ApiResponse.ok("홈 화면 데이터 조회 성공", response));
     }
+
+    // 8. 유저 정보 조회 (GET -> 알림 설정 화면 진입 시 이용)
+    @GetMapping("/{userId}")
+    public ResponseEntity<ApiResponse<UserResponse>> getUser(@PathVariable Long userId) {
+        UserResponse response = userService.getUser(userId);
+        return ResponseEntity.ok(ApiResponse.ok("유저 정보 조회 성공", response));
+    }
+
+    // 9. 알림 허용 여부 토글 (PATCH)
+    @PatchMapping("/{userId}/notification")
+    public ResponseEntity<ApiResponse<String>> updateNotificationSetting(
+            @PathVariable Long userId,
+            @Valid @RequestBody UserNotificationRequest request
+    ) {
+        userService.updateNotificationSetting(userId, request.enabled());
+        return ResponseEntity.ok(ApiResponse.ok("알림 설정이 수정되었습니다.", "Success"));
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/example/hackathon/domain/user/dto/request/UserNotificationRequest.java b/src/main/java/com/example/hackathon/domain/user/dto/request/UserNotificationRequest.java
new file mode 100644
index 0000000..12fa576
--- /dev/null
+++ b/src/main/java/com/example/hackathon/domain/user/dto/request/UserNotificationRequest.java
@@ -0,0 +1,8 @@
+package com.example.hackathon.domain.user.dto.request;
+
+import jakarta.validation.constraints.NotNull;
+
+public record UserNotificationRequest(
+    @NotNull(message = "알림 설정값은 필수입니다.")
+    Boolean enabled
+) {}
diff --git a/src/main/java/com/example/hackathon/domain/user/dto/response/UserResponse.java b/src/main/java/com/example/hackathon/domain/user/dto/response/UserResponse.java
new file mode 100644
index 0000000..9f371c6
--- /dev/null
+++ b/src/main/java/com/example/hackathon/domain/user/dto/response/UserResponse.java
@@ -0,0 +1,12 @@
+package com.example.hackathon.domain.user.dto.response;
+
+public record UserResponse(
+    Long id,
+    String nickname,
+    String email,
+    boolean emailNotificationEnabled
+) {
+    public static UserResponse of(Long id, String nickname, String email, boolean emailNotificationEnabled) {
+        return new UserResponse(id, nickname, email, emailNotificationEnabled);
+    }
+}
diff --git a/src/main/java/com/example/hackathon/domain/user/entity/User.java b/src/main/java/com/example/hackathon/domain/user/entity/User.java
index 007f0a3..ef5e8b7 100644
--- a/src/main/java/com/example/hackathon/domain/user/entity/User.java
+++ b/src/main/java/com/example/hackathon/domain/user/entity/User.java
@@ -127,4 +127,8 @@ public void updateLastPopupShownDate(LocalDate date) {
     public void updateLastSettlementDate(LocalDate date) {
         this.lastSettlementDate = date;
     }
+
+    public void updateEmailNotificationEnabled(boolean enabled) {
+        this.emailNotificationEnabled = enabled;
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/example/hackathon/domain/user/service/UserService.java b/src/main/java/com/example/hackathon/domain/user/service/UserService.java
index 8dec6bd..7752e30 100644
--- a/src/main/java/com/example/hackathon/domain/user/service/UserService.java
+++ b/src/main/java/com/example/hackathon/domain/user/service/UserService.java
@@ -4,6 +4,7 @@
 import com.example.hackathon.domain.user.repository.UserRepository;
 import com.example.hackathon.domain.user.dto.response.UserCreateResponse;
 import com.example.hackathon.domain.user.dto.response.UserHomeResponse;
+import com.example.hackathon.domain.user.dto.response.UserResponse;
 import com.example.hackathon.domain.user.dto.response.UserHomeResponse.HomeMemberStatus;
 import com.example.hackathon.domain.user.dto.response.UserHomeResponse.HomePopupInfo;
 import com.example.hackathon.domain.user.entity.DailySettlementLog;
@@ -102,6 +103,20 @@ public void updateUserEmail(Long userId, String email) {
         user.updateEmail(email);
     }
 
+    @Transactional(readOnly = true)
+    public UserResponse getUser(Long userId) {
+        User user = userRepository.findById(userId)
+                .orElseThrow(() -> new BusinessException(ErrorCode.USER_ERROR_404_NOT_FOUND));
+        return UserResponse.of(user.getId(), user.getNickname(), user.getEmail(), user.isEmailNotificationEnabled());
+    }
+
+    @Transactional
+    public void updateNotificationSetting(Long userId, boolean enabled) {
+        User user = userRepository.findById(userId)
+                .orElseThrow(() -> new BusinessException(ErrorCode.USER_ERROR_404_NOT_FOUND));
+        user.updateEmailNotificationEnabled(enabled);
+    }
+
     @Transactional
     public UserHomeResponse getHomeData(Long userId) {
         User user = userRepository.findByIdForUpdate(userId)
diff --git a/src/test/java/com/example/hackathon/domain/user/service/UserServiceTest.java b/src/test/java/com/example/hackathon/domain/user/service/UserServiceTest.java
index 604d02d..f3ff88a 100644
--- a/src/test/java/com/example/hackathon/domain/user/service/UserServiceTest.java
+++ b/src/test/java/com/example/hackathon/domain/user/service/UserServiceTest.java
@@ -13,6 +13,7 @@
 import com.example.hackathon.domain.team.repository.TeamMemberRepository;
 import com.example.hackathon.domain.team.repository.TeamRepository;
 import com.example.hackathon.domain.user.dto.response.UserHomeResponse;
+import com.example.hackathon.domain.user.dto.response.UserResponse;
 import com.example.hackathon.domain.user.entity.DailySettlementLog;
 import com.example.hackathon.domain.user.entity.User;
 import com.example.hackathon.domain.user.repository.DailySettlementLogRepository;
@@ -171,4 +172,34 @@ void homeDataThrowsWhenDetoxTimeNull() {
                 () -> userService.getHomeData(user.getId())
         );
     }
+
+    @Test
+    @DisplayName("유저 상세 조회 시 등록 정보가 정상 반환된다")
+    void getUserDetailsSuccess() {
+        // given
+        User user = createUser("길동", "test@test.com");
+        
+        // when
+        UserResponse response = userService.getUser(user.getId());
+        
+        // then
+        assertThat(response.id()).isEqualTo(user.getId());
+        assertThat(response.nickname()).isEqualTo("길동");
+        assertThat(response.email()).isEqualTo("test@test.com");
+        assertThat(response.emailNotificationEnabled()).isTrue();
+    }
+
+    @Test
+    @DisplayName("알림 토글 API 호출 시 수신동의 플래그가 정상 업데이트된다")
+    void updateNotificationSettingSuccess() {
+        // given
+        User user = createUser("길동", "test@test.com");
+        
+        // when
+        userService.updateNotificationSetting(user.getId(), false);
+        
+        // then
+        User updated = userRepository.findById(user.getId()).orElseThrow();
+        assertThat(updated.isEmailNotificationEnabled()).isFalse();
+    }
 }