diff --git a/build.gradle b/build.gradle
index d2241b3..9bd2044 100644
--- a/build.gradle
+++ b/build.gradle
@@ -52,8 +52,8 @@ dependencies {
     implementation 'org.springframework.boot:spring-boot-starter-validation'
 
     // S3
-    implementation 'org.springframework.cloud:spring-cloud-starter-aws:2.2.6.RELEASE'
-    implementation 'com.amazonaws:aws-java-sdk-s3:1.12.683'
+    implementation 'io.awspring.cloud:spring-cloud-starter-aws:3.3.0'
+    implementation 'software.amazon.awssdk:s3:2.20.14'
     // Resilience4j
     implementation 'io.github.resilience4j:resilience4j-spring-boot2:1.7.1'
     implementation 'io.github.resilience4j:resilience4j-bulkhead:1.7.1'
diff --git a/src/main/java/com/example/gtable/storeImage/controller/StoreImageController.java b/src/main/java/com/example/gtable/storeImage/controller/StoreImageController.java
index 8b92e5a..998c7bc 100644
--- a/src/main/java/com/example/gtable/storeImage/controller/StoreImageController.java
+++ b/src/main/java/com/example/gtable/storeImage/controller/StoreImageController.java
@@ -31,6 +31,21 @@ public ResponseEntity<?> uploadStoreImage(
 		@RequestParam("files") List<MultipartFile> files,
 		@RequestParam(value = "types") List<String> types
 	) {
+		// TODO 관련 정책 확정되면 메서드로 분리 예정
+		// 파일 개수 제한 검증
+		if (files.isEmpty() || files.size() > 10) {
+			throw new IllegalArgumentException("파일은 1개 이상 10개 이하로 업로드해 주세요.");
+		}
+		// 파일 크기 검증
+		for (MultipartFile file : files) {
+			if (file.isEmpty()) {
+				throw new IllegalArgumentException("빈 파일은 업로드할 수 없습니다.");
+			}
+			if (file.getSize() > 10 * 1024 * 1024) { // 10MB 제한
+				throw new IllegalArgumentException("파일 크기는 10MB를 초과할 수 없습니다.");
+			}
+		}
+
 		List<StoreImageUploadResponse> response = storeImageService.saveAll(storeId, files, types);
 		return ResponseEntity
 			.status(HttpStatus.CREATED)
diff --git a/src/main/java/com/example/gtable/storeImage/service/StoreImageService.java b/src/main/java/com/example/gtable/storeImage/service/StoreImageService.java
index 92ccf1d..b5efc77 100644
--- a/src/main/java/com/example/gtable/storeImage/service/StoreImageService.java
+++ b/src/main/java/com/example/gtable/storeImage/service/StoreImageService.java
@@ -2,6 +2,7 @@
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CompletableFuture;
 
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -34,15 +35,26 @@ public List<StoreImageUploadResponse> saveAll(Long storeId, List<MultipartFile>
 		Store store = storeRepository.findById(storeId)
 			.orElseThrow(() -> new EntityNotFoundException("Store not found with id: " + storeId));
 
-		List<StoreImageUploadResponse> imageUploadResponses = new ArrayList<>();
-		for (int i = 0; i < files.size(); i++) {
-			S3Service.S3UploadResult uploadResult;
-			try {
-				uploadResult = s3Service.upload(storeId, files.get(i)).get();
-			} catch (Exception e) {
-				throw new RuntimeException("S3 업로드 실패", e);
-			}
+		// 모든 파일을 비동기로 업로드
+		List<CompletableFuture<S3Service.S3UploadResult>> uploadFutures = new ArrayList<>();
+		for (MultipartFile file : files) {
+			uploadFutures.add(s3Service.upload(storeId, file));
+		}
 
+		// 모든 업로드 완료 대기
+		List<S3Service.S3UploadResult> uploadResults;
+		try {
+			uploadResults = uploadFutures.stream()
+				.map(CompletableFuture::join)
+				.toList();
+		} catch (Exception e) {
+			throw new RuntimeException("S3 업로드 실패", e);
+		}
+
+		// DB 저장은 모든 S3 업로드 성공 후 수행
+		List<StoreImageUploadResponse> imageUploadResponses = new ArrayList<>();
+		for (int i = 0; i < uploadResults.size(); i++) {
+			S3Service.S3UploadResult uploadResult = uploadResults.get(i);
 			StoreImage storeImage = StoreImage.builder()
 				.store(store)
 				.imageUrl(uploadResult.url())