diff --git a/src/main/java/org/runimo/runimo/auth/controller/AuthController.java b/src/main/java/org/runimo/runimo/auth/controller/AuthController.java
index 0927bbfc..ab6faf8d 100644
--- a/src/main/java/org/runimo/runimo/auth/controller/AuthController.java
+++ b/src/main/java/org/runimo/runimo/auth/controller/AuthController.java
@@ -25,12 +25,16 @@
 import org.runimo.runimo.common.response.SuccessResponse;
 import org.runimo.runimo.exceptions.RegisterErrorResponse;
 import org.runimo.runimo.user.enums.UserHttpResponseCode;
+import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestHeader;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RequestPart;
 import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.multipart.MultipartFile;
 
 @Tag(name = "Auth API", description = "인증 관련 API 모음")
 @RestController
@@ -86,11 +90,13 @@ public ResponseEntity<Response> appleLogin(
                 schema = @Schema(implementation = ErrorResponse.class))),
         @ApiResponse(responseCode = "409", description = "이미 존재하는 사용자")
     })
-    @PostMapping("/signup")
+    @PostMapping(value = "/signup", consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
     public ResponseEntity<SuccessResponse<SignupUserResponse>> signupAndLogin(
-        @Valid @RequestBody AuthSignupRequest request) {
+        @RequestParam @Valid AuthSignupRequest request,
+        @RequestPart(value = "profileImage", required = false) MultipartFile profileImage
+    ) {
         SignupUserResponse authResult = signUpUsecase.register(
-            request.toUserSignupCommand()
+            request.toUserSignupCommand(profileImage)
         );
         return ResponseEntity.created(URI.create("/api/v1/user" + authResult.userId()))
             .body(SuccessResponse.of(
diff --git a/src/main/java/org/runimo/runimo/auth/controller/request/AuthSignupConverter.java b/src/main/java/org/runimo/runimo/auth/controller/request/AuthSignupConverter.java
new file mode 100644
index 00000000..836c1378
--- /dev/null
+++ b/src/main/java/org/runimo/runimo/auth/controller/request/AuthSignupConverter.java
@@ -0,0 +1,20 @@
+package org.runimo.runimo.auth.controller.request;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jakarta.validation.constraints.NotNull;
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class AuthSignupConverter implements Converter<String, AuthSignupRequest> {
+
+  private final ObjectMapper objectMapper;
+    @SneakyThrows
+    @Override
+    public AuthSignupRequest convert(@NotNull String source) {
+      return objectMapper.readValue(source, AuthSignupRequest.class);
+    }
+}
diff --git a/src/main/java/org/runimo/runimo/auth/controller/request/AuthSignupRequest.java b/src/main/java/org/runimo/runimo/auth/controller/request/AuthSignupRequest.java
index 87c63e14..50f3dc04 100644
--- a/src/main/java/org/runimo/runimo/auth/controller/request/AuthSignupRequest.java
+++ b/src/main/java/org/runimo/runimo/auth/controller/request/AuthSignupRequest.java
@@ -2,9 +2,9 @@
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.constraints.NotBlank;
-import org.hibernate.validator.constraints.URL;
 import org.runimo.runimo.auth.service.dto.UserSignupCommand;
 import org.runimo.runimo.user.domain.Gender;
+import org.springframework.web.multipart.MultipartFile;
 
 @Schema(description = "사용자 회원가입 요청 DTO")
 public record AuthSignupRequest(
@@ -14,14 +14,11 @@ public record AuthSignupRequest(
     @Schema(description = "사용자 닉네임", example = "RunimoUser")
     @NotBlank String nickname,
 
-    @Schema(description = "프로필 이미지 URL", example = "https://example.com/image.jpg")
-    @URL String imgUrl,
-
     @Schema(description = "성별", example = "FEMALE")
     Gender gender
 ) {
 
-    public UserSignupCommand toUserSignupCommand() {
-        return new UserSignupCommand(registerToken, nickname, imgUrl, gender);
+    public UserSignupCommand toUserSignupCommand(MultipartFile file) {
+        return new UserSignupCommand(registerToken, nickname, file, gender);
     }
 }
diff --git a/src/main/java/org/runimo/runimo/auth/service/SignUpUsecaseImpl.java b/src/main/java/org/runimo/runimo/auth/service/SignUpUsecaseImpl.java
index ee9f2732..d066eaef 100644
--- a/src/main/java/org/runimo/runimo/auth/service/SignUpUsecaseImpl.java
+++ b/src/main/java/org/runimo/runimo/auth/service/SignUpUsecaseImpl.java
@@ -9,6 +9,7 @@
 import org.runimo.runimo.auth.repository.SignupTokenRepository;
 import org.runimo.runimo.auth.service.dto.SignupUserResponse;
 import org.runimo.runimo.auth.service.dto.UserSignupCommand;
+import org.runimo.runimo.external.FileStorageService;
 import org.runimo.runimo.user.domain.AppleUserToken;
 import org.runimo.runimo.user.domain.SocialProvider;
 import org.runimo.runimo.user.domain.User;
@@ -24,6 +25,7 @@ public class SignUpUsecaseImpl implements SignUpUsecase {
 
     private static final int REGISTER_CUTOFF_MIN = 10;
     private final UserRegisterService userRegisterService;
+    private final FileStorageService fileStorageService;
     private final JwtTokenFactory jwtTokenFactory;
     private final SignupTokenRepository signupTokenRepository;
     private final AppleUserTokenRepository appleUserTokenRepository;
@@ -34,9 +36,10 @@ public class SignUpUsecaseImpl implements SignUpUsecase {
     public SignupUserResponse register(UserSignupCommand command) {
         SignupTokenPayload payload = jwtResolver.getSignupTokenPayload(command.registerToken());
         SignupToken signupToken = findUnExpiredSignupToken(payload.token());
+        String imgUrl = fileStorageService.storeFile(command.profileImage());
         User savedUser = userRegisterService.registerUser(new UserRegisterCommand(
             command.nickname(),
-            command.imgUrl(),
+            imgUrl,
             command.gender(),
             payload.providerId(),
             payload.socialProvider())
diff --git a/src/main/java/org/runimo/runimo/auth/service/dto/UserSignupCommand.java b/src/main/java/org/runimo/runimo/auth/service/dto/UserSignupCommand.java
index d22f0ab6..9eefe623 100644
--- a/src/main/java/org/runimo/runimo/auth/service/dto/UserSignupCommand.java
+++ b/src/main/java/org/runimo/runimo/auth/service/dto/UserSignupCommand.java
@@ -2,11 +2,12 @@
 
 
 import org.runimo.runimo.user.domain.Gender;
+import org.springframework.web.multipart.MultipartFile;
 
 public record UserSignupCommand(
     String registerToken,
     String nickname,
-    String imgUrl,
+    MultipartFile profileImage,
     Gender gender
 ) {
 
diff --git a/src/main/java/org/runimo/runimo/config/S3Config.java b/src/main/java/org/runimo/runimo/config/S3Config.java
index 397596b4..2ab5a9f7 100644
--- a/src/main/java/org/runimo/runimo/config/S3Config.java
+++ b/src/main/java/org/runimo/runimo/config/S3Config.java
@@ -4,7 +4,10 @@
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
+import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
 import software.amazon.awssdk.regions.Region;
+import software.amazon.awssdk.services.s3.S3Client;
 import software.amazon.awssdk.services.s3.presigner.S3Presigner;
 
 @Configuration
@@ -28,4 +31,14 @@ public S3Presigner amazonS3Client() {
             )
             .build();
     }
+
+    @Bean
+    public S3Client s3Client() {
+        return S3Client.builder()
+            .region(Region.of(region))
+            .credentialsProvider(StaticCredentialsProvider.create(
+                AwsBasicCredentials.create(accessKey, secretKey)
+            ))
+            .build();
+    }
 }
diff --git a/src/main/java/org/runimo/runimo/config/WebMvcConfig.java b/src/main/java/org/runimo/runimo/config/WebMvcConfig.java
index db1a5125..b42984e8 100644
--- a/src/main/java/org/runimo/runimo/config/WebMvcConfig.java
+++ b/src/main/java/org/runimo/runimo/config/WebMvcConfig.java
@@ -2,8 +2,10 @@
 
 import java.util.List;
 import lombok.RequiredArgsConstructor;
+import org.runimo.runimo.auth.controller.request.AuthSignupConverter;
 import org.runimo.runimo.user.controller.UserIdResolver;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.format.FormatterRegistry;
 import org.springframework.web.method.support.HandlerMethodArgumentResolver;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
@@ -12,6 +14,12 @@
 public class WebMvcConfig implements WebMvcConfigurer {
 
     private final UserIdResolver userIdResolver;
+    private final AuthSignupConverter authSignupConverter;
+
+    @Override
+    public void addFormatters(FormatterRegistry registry) {
+        registry.addConverter(authSignupConverter);
+    }
 
     @Override
     public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers) {
diff --git a/src/main/java/org/runimo/runimo/external/ExternalResponseCode.java b/src/main/java/org/runimo/runimo/external/ExternalResponseCode.java
index 32b86173..0a3c5ff5 100644
--- a/src/main/java/org/runimo/runimo/external/ExternalResponseCode.java
+++ b/src/main/java/org/runimo/runimo/external/ExternalResponseCode.java
@@ -6,7 +6,9 @@
 public enum ExternalResponseCode implements CustomResponseCode {
     PRESIGNED_URL_FETCHED("ESH2011", HttpStatus.CREATED, "Presigned URL 발급 성공", "Presigned URL 발급 성공"),
 
-    PRESIGNED_URL_FETCH_FAILED("ESH4001", HttpStatus.BAD_REQUEST, "Presigned URL 발급 실패", "Presigned URL 발급 실패");
+    PRESIGNED_URL_FETCH_FAILED("ESH4001", HttpStatus.BAD_REQUEST, "Presigned URL 발급 실패", "Presigned URL 발급 실패"),
+    FILE_UPLOAD_FAILED("ESH4002", HttpStatus.INTERNAL_SERVER_ERROR, "파일 업로드 실패", "파일 업로드 실패"),;
+
     private final String code;
     private final HttpStatus httpStatus;
     private final String clientMessage;
diff --git a/src/main/java/org/runimo/runimo/external/FileStorageService.java b/src/main/java/org/runimo/runimo/external/FileStorageService.java
new file mode 100644
index 00000000..131dc72c
--- /dev/null
+++ b/src/main/java/org/runimo/runimo/external/FileStorageService.java
@@ -0,0 +1,47 @@
+package org.runimo.runimo.external;
+
+import java.net.URL;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+@Slf4j
+@Service
+@RequiredArgsConstructor
+public class FileStorageService {
+
+  private final S3Service s3Service;
+
+
+  public String storeFile(MultipartFile file) {
+    if (file == null || file.isEmpty()) {
+      log.debug("저장할 파일이 없습니다.");
+      return null;
+    }
+
+    try {
+      log.debug("파일 업로드 시작: {}", file.getOriginalFilename());
+      String fileUrl = s3Service.uploadFile(file);
+      log.debug("파일 업로드 완료: {}", fileUrl);
+      return fileUrl;
+    } catch (Exception e) {
+      log.error("파일 저장 중 오류 발생: {}", e.getMessage());
+      throw new RuntimeException("파일 저장 중 오류가 발생했습니다: " + e.getMessage(), e);
+    }
+  }
+
+  public URL generatePresignedUrl(String fileName) {
+    try {
+      return s3Service.generatePresignedUrl(fileName);
+    } catch (Exception e) {
+      log.error("Presigned URL 생성 중 오류 발생: {}", e.getMessage());
+      throw new RuntimeException("Presigned URL 생성 중 오류가 발생했습니다: " + e.getMessage(), e);
+    }
+  }
+
+  public String getFileUrl(String objectKey) {
+    return s3Service.getFileUrl(objectKey);
+  }
+
+}
diff --git a/src/main/java/org/runimo/runimo/external/ImageUploadController.java b/src/main/java/org/runimo/runimo/external/ImageUploadController.java
index 79342db1..2e349253 100644
--- a/src/main/java/org/runimo/runimo/external/ImageUploadController.java
+++ b/src/main/java/org/runimo/runimo/external/ImageUploadController.java
@@ -19,7 +19,7 @@
 @RequiredArgsConstructor
 public class ImageUploadController {
 
-    private final S3Service s3Service;
+    private final FileStorageService fileStorageService;
 
     @Operation(summary = "Presigned URL 발급", description = "Presigned URL을 발급합니다.")
     @ApiResponses(value = {
@@ -32,7 +32,7 @@ public class ImageUploadController {
     public ResponseEntity<SuccessResponse<String>> upload(
         @RequestBody ImageUploadRequest request
     ) {
-        URL presignedUrl = s3Service.generatePresignedUrl(request.fileName());
+        URL presignedUrl = fileStorageService.generatePresignedUrl(request.fileName());
         return ResponseEntity.status(201)
             .body(SuccessResponse.of(
                 ExternalResponseCode.PRESIGNED_URL_FETCHED,
diff --git a/src/main/java/org/runimo/runimo/external/S3Service.java b/src/main/java/org/runimo/runimo/external/S3Service.java
index 039d1ca1..e37fa682 100644
--- a/src/main/java/org/runimo/runimo/external/S3Service.java
+++ b/src/main/java/org/runimo/runimo/external/S3Service.java
@@ -1,5 +1,6 @@
 package org.runimo.runimo.external;
 
+import java.io.IOException;
 import java.net.URL;
 import java.time.Duration;
 import java.util.UUID;
@@ -7,7 +8,11 @@
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+import software.amazon.awssdk.core.sync.RequestBody;
+import software.amazon.awssdk.services.s3.S3Client;
 import software.amazon.awssdk.services.s3.model.PutObjectRequest;
+import software.amazon.awssdk.services.s3.model.PutObjectResponse;
 import software.amazon.awssdk.services.s3.presigner.S3Presigner;
 import software.amazon.awssdk.services.s3.presigner.model.PresignedPutObjectRequest;
 import software.amazon.awssdk.services.s3.presigner.model.PutObjectPresignRequest;
@@ -18,12 +23,13 @@
 public class S3Service {
 
     private final S3Presigner s3Presigner;
+    private final S3Client s3Client;
     @Value("${cloud.aws.s3.bucket}")
     private String bucketName;
 
     public URL generatePresignedUrl(String fileName) {
         validateFileName(fileName);
-        String objectKey = "uploads/" + UUID.randomUUID() + "_" + sanitizeFileName(fileName);
+        String objectKey = generateObjectKey(fileName);
         try {
             PutObjectPresignRequest presignRequest = PutObjectPresignRequest.builder()
                 .signatureDuration(Duration.ofMinutes(10))  // The URL expires in 10 minutes.
@@ -38,6 +44,46 @@ public URL generatePresignedUrl(String fileName) {
         }
     }
 
+    public String uploadFile(MultipartFile file) {
+        if (file == null || file.isEmpty()) {
+            throw new IllegalArgumentException("파일이 비어있습니다.");
+        }
+
+        validateFileName(file.getOriginalFilename());
+        String objectKey = generateObjectKey(file.getOriginalFilename());
+
+        try {
+            PutObjectRequest putObjectRequest = createPutObjectRequest(bucketName, objectKey);
+
+            // 파일 데이터로 RequestBody 생성
+            RequestBody requestBody = RequestBody.fromInputStream(
+                file.getInputStream(),
+                file.getSize()
+            );
+
+            // S3에 파일 업로드
+            PutObjectResponse response = s3Client.putObject(putObjectRequest, requestBody);
+            log.debug("파일 업로드 완료: {}, ETag: {}", objectKey, response.eTag());
+
+            // 파일 URL 생성 및 반환
+            return getFileUrl(objectKey);
+        } catch (IOException e) {
+            log.error("파일 업로드 중 I/O 오류 발생: {}", e.getMessage());
+            throw ExternalServiceException.of(ExternalResponseCode.FILE_UPLOAD_FAILED);
+        } catch (Exception e) {
+            log.error("파일 업로드 중 오류 발생: {}", e.getMessage());
+            throw ExternalServiceException.of(ExternalResponseCode.FILE_UPLOAD_FAILED);
+        }
+    }
+
+    public String getFileUrl(String objectKey) {
+        return "https://" + bucketName + ".s3.amazonaws.com/" + objectKey;
+    }
+
+    private String generateObjectKey(String fileName) {
+        return "uploads/" + UUID.randomUUID() + "_" + sanitizeFileName(fileName);
+    }
+
     private void validateFileName(String fileName) {
         if (fileName == null || fileName.isEmpty()) {
             throw new IllegalArgumentException("파일명이 비어있습니다.");
diff --git a/src/main/java/org/runimo/runimo/user/domain/Gender.java b/src/main/java/org/runimo/runimo/user/domain/Gender.java
index 96603795..b63bce44 100644
--- a/src/main/java/org/runimo/runimo/user/domain/Gender.java
+++ b/src/main/java/org/runimo/runimo/user/domain/Gender.java
@@ -1,5 +1,7 @@
 package org.runimo.runimo.user.domain;
 
-public enum Gender {
+import java.io.Serializable;
+
+public enum Gender implements Serializable {
     MALE, FEMALE, UNKNOWN;
 }
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index f87a1c70..de53c9b2 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -12,6 +12,12 @@ runimo:
     iv: ${AES_IV}
 
 spring:
+  servlet:
+    multipart:
+      enabled: true
+      max-request-size: 15MB
+      max-file-size: 10MB
+
   config:
     import:
       - optional:file:${ENV_PATH:.}/.env.${SPRING_PROFILES_ACTIVE:dev}[.properties]
diff --git a/src/test/java/org/runimo/runimo/auth/controller/AuthControllerTest.java b/src/test/java/org/runimo/runimo/auth/controller/AuthControllerTest.java
index 6f452793..7f649bdc 100644
--- a/src/test/java/org/runimo/runimo/auth/controller/AuthControllerTest.java
+++ b/src/test/java/org/runimo/runimo/auth/controller/AuthControllerTest.java
@@ -2,6 +2,7 @@
 
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.BDDMockito.given;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.multipart;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
@@ -134,10 +135,10 @@ class AuthControllerTest {
             .willThrow(UserJwtException.of(UserHttpResponseCode.TOKEN_INVALID));
 
         // when & then
-        mockMvc.perform(post("/api/v1/auth/signup")
-                .contentType(MediaType.APPLICATION_JSON)
-                .content(
-                    "{\"register_token\":\"invalid-token\", \"nickname\":\"RunimoUser\", \"img_url\":\"https://example.com/image.jpg\"}"))
+        mockMvc.perform(
+            multipart(
+                "/api/v1/auth/signup")
+                .param("request", "{\"registerToken\":\"invalid-token\", \"nickname\":\"RunimoUser\"}"))
             .andExpect(status().isUnauthorized())
             .andExpect(jsonPath("$.code").value(UserHttpResponseCode.TOKEN_INVALID.getCode()))
             .andExpect(
diff --git a/src/test/java/org/runimo/runimo/rewards/RewardTest.java b/src/test/java/org/runimo/runimo/rewards/RewardTest.java
index 42d7fe03..f244d068 100644
--- a/src/test/java/org/runimo/runimo/rewards/RewardTest.java
+++ b/src/test/java/org/runimo/runimo/rewards/RewardTest.java
@@ -74,7 +74,7 @@ void setUp() {
             null,
             SocialProvider.KAKAO
         ));
-        UserSignupCommand command = new UserSignupCommand(registerToken, "name", "1234", Gender.UNKNOWN);
+        UserSignupCommand command = new UserSignupCommand(registerToken, "name", null, Gender.UNKNOWN);
         Long useId = signUpUsecaseImpl.register(command).userId();
         savedUser = userRepository.findById(useId).orElse(null);
     }
diff --git a/src/test/java/org/runimo/runimo/user/api/UserItemAcceptanceTest.java b/src/test/java/org/runimo/runimo/user/api/UserItemAcceptanceTest.java
index b5494454..742272b1 100644
--- a/src/test/java/org/runimo/runimo/user/api/UserItemAcceptanceTest.java
+++ b/src/test/java/org/runimo/runimo/user/api/UserItemAcceptanceTest.java
@@ -150,13 +150,12 @@ void tearDown() {
         AuthSignupRequest request = new AuthSignupRequest(
             registerToken,
             "test-user",
-            "https://test-image.com",
             Gender.FEMALE
         );
 
         ValidatableResponse res = given()
-            .body(objectMapper.writeValueAsString(request))
-            .contentType(ContentType.JSON)
+            .multiPart("request", objectMapper.writeValueAsString(request))
+            .contentType("multipart/form-data")
             .when()
             .post("/api/v1/auth/signup")
             .then()