diff --git a/be/issue_tracker/build.gradle b/be/issue_tracker/build.gradle
index 884198ebd..b373b81af 100644
--- a/be/issue_tracker/build.gradle
+++ b/be/issue_tracker/build.gradle
@@ -40,6 +40,9 @@ dependencies {
     runtimeOnly 'com.mysql:mysql-connector-j'
     implementation 'org.springframework.boot:spring-boot-starter-data-jdbc'
 
+    // S3
+    implementation 'org.springframework.cloud:spring-cloud-starter-aws:2.2.6.RELEASE'
+
     // Test
     testRuntimeOnly 'com.h2database:h2'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
diff --git a/be/issue_tracker/src/main/java/team1/issuetracker/HomeController.java b/be/issue_tracker/src/main/java/team1/issuetracker/HomeController.java
index ad0dcfd51..e67948926 100644
--- a/be/issue_tracker/src/main/java/team1/issuetracker/HomeController.java
+++ b/be/issue_tracker/src/main/java/team1/issuetracker/HomeController.java
@@ -1,18 +1,27 @@
 package team1.issuetracker;
 
 import jakarta.servlet.http.HttpServletResponse;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.*;
+import org.springframework.web.multipart.MultipartFile;
+import team1.issuetracker.util.S3Util;
 
 import java.io.IOException;
 
 @RestController
 @RequestMapping("/")
+@RequiredArgsConstructor
 public class HomeController {
 
+    private final S3Util s3Util;
+
     @GetMapping("/github")
     public void redirectToGithub(HttpServletResponse httpServletResponse) throws IOException {
         httpServletResponse.sendRedirect("https://github.com/codesquad-masters2024-team01/issue-tracker");
     }
+
+    @PostMapping("/upload")
+    public String uploadImage(@RequestPart(value = "image", required = false) MultipartFile image){
+        return s3Util.upload(image);
+    }
 }
diff --git a/be/issue_tracker/src/main/java/team1/issuetracker/config/S3Config.java b/be/issue_tracker/src/main/java/team1/issuetracker/config/S3Config.java
new file mode 100644
index 000000000..dbe9841f0
--- /dev/null
+++ b/be/issue_tracker/src/main/java/team1/issuetracker/config/S3Config.java
@@ -0,0 +1,29 @@
+package team1.issuetracker.config;
+
+import com.amazonaws.auth.AWSStaticCredentialsProvider;
+import com.amazonaws.auth.BasicAWSCredentials;
+import com.amazonaws.regions.Regions;
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.AmazonS3ClientBuilder;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class S3Config {
+
+    @Value("${aws.s3.accessKey}")
+    private String accessKey;
+    @Value("${aws.s3.secretKey}")
+    private String secretKey;
+
+    @Bean
+    public AmazonS3 amazonS3Client(){
+        return AmazonS3ClientBuilder.standard()
+                .withCredentials(
+                        new AWSStaticCredentialsProvider(new BasicAWSCredentials(accessKey, secretKey))
+                )
+                .withRegion(Regions.AP_NORTHEAST_2)
+                .build();
+    }
+}
diff --git a/be/issue_tracker/src/main/java/team1/issuetracker/domain/user/UserController.java b/be/issue_tracker/src/main/java/team1/issuetracker/domain/user/UserController.java
index f55a070a8..c89c1a6b3 100644
--- a/be/issue_tracker/src/main/java/team1/issuetracker/domain/user/UserController.java
+++ b/be/issue_tracker/src/main/java/team1/issuetracker/domain/user/UserController.java
@@ -25,7 +25,7 @@ public void register(@RequestBody RegisterInfo registerInfo) throws IllegalArgum
         userService.createUser(registerInfo);
     }
 
-    @GetMapping("/duplicate")
+    @PostMapping("/duplicate")
     public boolean isDuplicate(@RequestBody CheckDuplicateRequest request) {
         if (request.id() != null) return userService.isDuplicateId(request.id());
         if (request.nickname() != null) return userService.isDuplicateNickName(request.nickname());
@@ -42,7 +42,7 @@ public String login(@RequestBody LoginInfo loginInfo) {
     @GetMapping("/login/github")
     public String githubLogin(@RequestParam String code){
         String id = githubLoginUtil.validateCode(code);
-        return id;
+        return jwtUtil.generateToken(id);
     }
 
     @GetMapping("/{id}")
diff --git a/be/issue_tracker/src/main/java/team1/issuetracker/util/S3Util.java b/be/issue_tracker/src/main/java/team1/issuetracker/util/S3Util.java
new file mode 100644
index 000000000..de3e57598
--- /dev/null
+++ b/be/issue_tracker/src/main/java/team1/issuetracker/util/S3Util.java
@@ -0,0 +1,95 @@
+package team1.issuetracker.util;
+
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.model.CannedAccessControlList;
+import com.amazonaws.services.s3.model.ObjectMetadata;
+import com.amazonaws.services.s3.model.PutObjectRequest;
+import com.amazonaws.util.IOUtils;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.web.multipart.MultipartFile;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+import java.util.UUID;
+
+@Component
+@RequiredArgsConstructor
+public class S3Util {
+    private final AmazonS3 amazonS3;
+
+    @Value("${aws.s3.bucketName}")
+    private String bucketName;
+
+    public String upload(MultipartFile image) {
+        //입력받은 이미지 파일이 빈 파일인지 검증
+        if (image.isEmpty() || Objects.isNull(image.getOriginalFilename())) {
+            throw new IllegalArgumentException();
+        }
+        //uploadImage를 호출하여 S3에 저장된 이미지의 public url을 반환한다.
+        return this.uploadImage(image);
+    }
+
+    private String uploadImage(MultipartFile image) {
+        this.validateImageFileExtention(image.getOriginalFilename());
+        try {
+            return this.uploadImageToS3(image);
+        } catch (IOException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    private void validateImageFileExtention(String filename) {
+        int lastDotIndex = filename.lastIndexOf(".");
+        if (lastDotIndex == -1) {
+            throw new IllegalArgumentException("-1");
+        }
+
+        String extention = filename.substring(lastDotIndex + 1).toLowerCase();
+        List<String> allowedExtentionList = Arrays.asList("jpg", "jpeg", "png", "gif");
+
+        if (!allowedExtentionList.contains(extention)) {
+            throw new IllegalArgumentException("extention");
+        }
+    }
+
+    private String uploadImageToS3(MultipartFile image) throws IOException {
+        String originalFilename = image.getOriginalFilename(); //원본 파일 명
+        String extention = originalFilename.substring(originalFilename.lastIndexOf(".")); //확장자 명
+
+        String s3FileName = UUID.randomUUID().toString().substring(0, 10) + originalFilename; //변경된 파일 명
+
+        InputStream is = image.getInputStream();
+        byte[] bytes = IOUtils.toByteArray(is); //image를 byte[]로 변환
+
+        ObjectMetadata metadata = new ObjectMetadata(); //metadata 생성
+        metadata.setContentType("image/" + extention);
+        metadata.setContentLength(bytes.length);
+
+        //S3에 요청할 때 사용할 byteInputStream 생성
+        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(bytes);
+
+        try {
+            //S3로 putObject 할 때 사용할 요청 객체
+            //생성자 : bucket 이름, 파일 명, byteInputStream, metadata
+            PutObjectRequest putObjectRequest =
+                    new PutObjectRequest(bucketName, s3FileName, byteArrayInputStream, metadata)
+                            .withCannedAcl(CannedAccessControlList.PublicRead);
+
+            //실제로 S3에 이미지 데이터를 넣는 부분이다.
+            amazonS3.putObject(putObjectRequest); // put image to S3
+        } catch (Exception e) {
+            throw new IllegalArgumentException(e);
+        } finally {
+            byteArrayInputStream.close();
+            is.close();
+        }
+
+        return amazonS3.getUrl(bucketName, s3FileName).toString();
+    }
+}
diff --git a/be/issue_tracker/src/main/resources/static/index.html b/be/issue_tracker/src/main/resources/static/index.html
index f47a7318a..497c6ca25 100644
--- a/be/issue_tracker/src/main/resources/static/index.html
+++ b/be/issue_tracker/src/main/resources/static/index.html
@@ -33,6 +33,46 @@
             object-fit: cover;
             border: 2px solid #000;
         }
+
+        .upload-btn {
+            display: inline-block;
+            padding: 10px 20px;
+            font-size: 16px;
+            cursor: pointer;
+            background-color: #4CAF50;
+            color: white;
+            border: none;
+            border-radius: 5px;
+            transition: background-color 0.3s;
+            text-align: center;
+            text-decoration: none;
+            margin-top: 10px;
+        }
+
+        .upload-btn:hover {
+            background-color: #45a049;
+        }
+
+        .upload-image-container {
+            margin-top: 20px;
+            width: 300px;
+            height: 300px;
+            border: 2px solid #000;
+            overflow: hidden;
+            display: flex;
+            align-items: center;
+            justify-content: center;
+        }
+
+        .upload-image-container img {
+            width: 100%;
+            height: 100%;
+            object-fit: cover;
+        }
+
+        input[type="file"] {
+            display: none;
+        }
     </style>
 </head>
 <body>
@@ -48,6 +88,7 @@
     >
         로그인
     </a>
+
     <a href="https://github.com/codesquad-masters2024-team01/issue-tracker/tree/Deploy" target="_blank">
         <img src="https://soapbucket51.s3.ap-northeast-2.amazonaws.com/issue_tracker/github.png" alt="Image 1">
     </a>
@@ -59,5 +100,42 @@
         <img src="https://soapbucket51.s3.ap-northeast-2.amazonaws.com/issue_tracker/poo.jpg" alt="Image 3">
     </a>
 </div>
+
+<div style="padding-left: 100px">
+    <form id="uploadForm" action="/upload" method="post" enctype="multipart/form-data">
+        <input type="file" id="fileInput" name="image" accept="image/*">
+        <div class="upload-image-container" id="imagePreview">
+            <p>No image chosen</p>
+        </div>
+        <button type="button" class="upload-btn" id="chooseImageBtn">Choose Image</button>
+        <button type="submit" class="upload-btn">Upload Image</button>
+    </form>
+</div>
+
+<script>
+        const fileInput = document.getElementById('fileInput');
+        const chooseImageBtn = document.getElementById('chooseImageBtn');
+        const imagePreview = document.getElementById('imagePreview');
+
+        chooseImageBtn.addEventListener('click', function() {
+            fileInput.click();
+        });
+
+        fileInput.addEventListener('change', function(event) {
+            const file = event.target.files[0];
+            if (file) {
+                const reader = new FileReader();
+                reader.onload = function(e) {
+                    const img = document.createElement('img');
+                    img.src = e.target.result;
+                    imagePreview.innerHTML = '';
+                    imagePreview.appendChild(img);
+                };
+                reader.readAsDataURL(file);
+            } else {
+                imagePreview.innerHTML = '<p>No image chosen</p>';
+            }
+        });
+    </script>
 </body>
 </html>