diff --git a/src/main/java/com/umc/hackaton/snapspot/spot/entity/Spot.java b/src/main/java/com/umc/hackaton/snapspot/spot/entity/Spot.java
index 8721db0..7defc85 100644
--- a/src/main/java/com/umc/hackaton/snapspot/spot/entity/Spot.java
+++ b/src/main/java/com/umc/hackaton/snapspot/spot/entity/Spot.java
@@ -35,11 +35,11 @@ public class Spot extends BaseEntity {
     @Column(name = "img_url", nullable = false)
     private String imgUrl;
 
-    @Column(name = "like_num", nullable = false)
-    private Long likeNum;
+    @Column(name = "like_num")
+    private Long likeNum = 0L;
 
-    @Column(name = "visit_num", nullable = false)
-    private Long visitNum;
+    @Column(name = "visit_num")
+    private Long visitNum =0L;
 
     @Column(name = "title", nullable = false)
     private String title;
diff --git a/src/main/java/com/umc/hackaton/snapspot/user/repository/UserRepository.java b/src/main/java/com/umc/hackaton/snapspot/user/repository/UserRepository.java
index 0b3cff5..a6b441a 100644
--- a/src/main/java/com/umc/hackaton/snapspot/user/repository/UserRepository.java
+++ b/src/main/java/com/umc/hackaton/snapspot/user/repository/UserRepository.java
@@ -6,7 +6,7 @@
 import java.util.Optional;
 
 public interface UserRepository extends JpaRepository<User, Long> {
-    Optional<User> findByUserId(String userId);
+    Optional<User> findByUsername(String username);
 
     User findUserById(Long id);
 }
diff --git a/src/main/java/com/umc/hackaton/snapspot/user/service/UserService.java b/src/main/java/com/umc/hackaton/snapspot/user/service/UserService.java
index 6345606..96a5080 100644
--- a/src/main/java/com/umc/hackaton/snapspot/user/service/UserService.java
+++ b/src/main/java/com/umc/hackaton/snapspot/user/service/UserService.java
@@ -1,16 +1,22 @@
 package com.umc.hackaton.snapspot.user.service;
 
-import com.umc.hackaton.snapspot.user.dto.UserRequestDto;
+import com.umc.hackaton.snapspot.user.dto.request.ImageUploadDto;
+import com.umc.hackaton.snapspot.user.dto.request.LoginDto;
+import com.umc.hackaton.snapspot.user.dto.request.UserRequestDto;
+import com.umc.hackaton.snapspot.user.dto.response.UserResponseDto;
 import com.umc.hackaton.snapspot.user.entity.User;
 import com.umc.hackaton.snapspot.user.repository.UserRepository;
 import jakarta.transaction.Transactional;
 import lombok.RequiredArgsConstructor;
-import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.stereotype.Service;
 
+import java.util.Optional;
+
 @Service
 @RequiredArgsConstructor
+@Slf4j
 public class UserService {
 
     private final UserRepository userRepository;
@@ -18,13 +24,35 @@ public class UserService {
 
     @Transactional
     public void signUp(UserRequestDto dto) {
-
-//        Optional<User> existingUser = userRepository.findByUserId(dto.getUserId());
-//        if (existingUser.isPresent()) {
-//            User user = existingUser.get();
-//        } else {
         User user = dto.toEntity(encoder);
         userRepository.save(user);
     }
+
+    @Transactional
+    public UserResponseDto login(LoginDto dto) {
+        Optional<User> loginuser = userRepository.findByUsername(dto.getUsername());
+        if (loginuser.isEmpty()) {
+            throw new IllegalArgumentException("존재하지 않는 사용자입니다.");
+        }
+
+        if (!encoder.matches(dto.getPassword(), loginuser.get().getPassword())) {
+            throw new IllegalArgumentException("비밀번호가 일치하지 않습니다.");
+        }
+
+        return UserResponseDto.builder()
+                .id(loginuser.get().getId())
+                .username(loginuser.get().getUsername())
+                .build();
+    }
+
+    @Transactional
+    public void imageUploads(ImageUploadDto dto) {
+        Optional<User> user = userRepository.findById(dto.getId());
+        if (user.isEmpty()) {
+            throw new IllegalArgumentException("존재하지 않는 사용자입니다.");
+        }
+        user.get().updateProfileImg(dto.getImage());
+
+    }
 }