diff --git a/backend/src/main/java/org/dgu/backend/common/constant/SuccessStatus.java b/backend/src/main/java/org/dgu/backend/common/constant/SuccessStatus.java
index c6ce9e1..5d22f5c 100644
--- a/backend/src/main/java/org/dgu/backend/common/constant/SuccessStatus.java
+++ b/backend/src/main/java/org/dgu/backend/common/constant/SuccessStatus.java
@@ -23,6 +23,7 @@ public enum SuccessStatus implements BaseCode {
     SUCCESS_GET_RECENT_BACKTESTING_RESULT(HttpStatus.OK, "200", "백테스팅 최근 결과 조회에 성공했습니다."),
     // User
     SUCCESS_LOGOUT(HttpStatus.OK, "200", "유저 로그아웃에 성공했습니다."),
+    SUCCESS_ADD_AGREEMENT(HttpStatus.CREATED, "201", "서비스 약관 동의 여부 등록에 성공했습니다."),
     // Portfolio
     SUCCESS_GET_PORTFOLIOS(HttpStatus.OK, "200", "포트폴리오 조회에 성공했습니다."),
     SUCCESS_GET_PORTFOLIO_DETAILS(HttpStatus.OK, "200", "포트폴리오 상세 조회에 성공했습니다."),
diff --git a/backend/src/main/java/org/dgu/backend/controller/UserController.java b/backend/src/main/java/org/dgu/backend/controller/UserController.java
index 73c268d..730d9ce 100644
--- a/backend/src/main/java/org/dgu/backend/controller/UserController.java
+++ b/backend/src/main/java/org/dgu/backend/controller/UserController.java
@@ -23,4 +23,13 @@ public ResponseEntity<ApiResponse<Object>> addUserUpbitKeys(
         userService.addUserUpbitKeys(authorizationHeader, userUpbitKeyRequest);
         return ApiResponse.onSuccess(SuccessStatus.SUCCESS_ADD_UPBIT_KEYS);
     }
+
+    // 서비스 약관 동의 여부 등록 API
+    @PostMapping("/agreement")
+    public ResponseEntity<ApiResponse<Object>> addUserAgreement(
+            @RequestHeader("Authorization") String authorizationHeader) {
+
+        userService.addUserAgreement(authorizationHeader);
+        return ApiResponse.onSuccess(SuccessStatus.SUCCESS_ADD_AGREEMENT);
+    }
 }
\ No newline at end of file
diff --git a/backend/src/main/java/org/dgu/backend/domain/User.java b/backend/src/main/java/org/dgu/backend/domain/User.java
index 096044c..7b54a0f 100644
--- a/backend/src/main/java/org/dgu/backend/domain/User.java
+++ b/backend/src/main/java/org/dgu/backend/domain/User.java
@@ -32,6 +32,9 @@ public class User extends BaseEntity {
     @Column(name = "current_portfolios_uuid", columnDefinition = "BINARY(16)")
     private UUID currentPortfolioId;
 
+    @Column(name = "is_agree", nullable = false)
+    private Boolean isAgree;
+
     @OneToMany(mappedBy = "user", cascade = CascadeType.ALL, orphanRemoval = true)
     private List<Portfolio> portfolios;
 
@@ -47,5 +50,10 @@ public User(UUID userId, String name, String provider, String providerId) {
         this.name = name;
         this.provider = provider;
         this.providerId = providerId;
+        this.isAgree = false;
+    }
+
+    public void updateAgreement() {
+        this.isAgree = true;
     }
 }
\ No newline at end of file
diff --git a/backend/src/main/java/org/dgu/backend/exception/UserErrorResult.java b/backend/src/main/java/org/dgu/backend/exception/UserErrorResult.java
index a749e6b..4abdf7e 100644
--- a/backend/src/main/java/org/dgu/backend/exception/UserErrorResult.java
+++ b/backend/src/main/java/org/dgu/backend/exception/UserErrorResult.java
@@ -9,7 +9,8 @@
 @Getter
 @RequiredArgsConstructor
 public enum UserErrorResult implements BaseErrorCode  {
-    NOT_FOUND_USER(HttpStatus.NOT_FOUND, "404", "존재하지 않는 유저입니다.");
+    NOT_FOUND_USER(HttpStatus.NOT_FOUND, "404", "존재하지 않는 유저입니다."),
+    ALREADY_AGREED(HttpStatus.CONFLICT, "409", "이미 서비스 약관 동의를 한 유저입니다.");
 
     private final HttpStatus httpStatus;
     private final String code;
diff --git a/backend/src/main/java/org/dgu/backend/service/UserService.java b/backend/src/main/java/org/dgu/backend/service/UserService.java
index 205d02d..6ca9dde 100644
--- a/backend/src/main/java/org/dgu/backend/service/UserService.java
+++ b/backend/src/main/java/org/dgu/backend/service/UserService.java
@@ -4,4 +4,5 @@
 
 public interface UserService {
     void addUserUpbitKeys(String authorizationHeader, UserDto.UserUpbitKeyRequest userUpbitKeyRequest);
+    void addUserAgreement(String authorizationHeader);
 }
\ No newline at end of file
diff --git a/backend/src/main/java/org/dgu/backend/service/UserServiceImpl.java b/backend/src/main/java/org/dgu/backend/service/UserServiceImpl.java
index ffdd4ae..93016f5 100644
--- a/backend/src/main/java/org/dgu/backend/service/UserServiceImpl.java
+++ b/backend/src/main/java/org/dgu/backend/service/UserServiceImpl.java
@@ -5,6 +5,8 @@
 import org.dgu.backend.domain.UpbitKey;
 import org.dgu.backend.domain.User;
 import org.dgu.backend.dto.UserDto;
+import org.dgu.backend.exception.UserErrorResult;
+import org.dgu.backend.exception.UserException;
 import org.dgu.backend.repository.UpbitKeyRepository;
 import org.dgu.backend.util.AESUtil;
 import org.dgu.backend.util.EncryptionUtil;
@@ -37,6 +39,17 @@ public void addUserUpbitKeys(String authorizationHeader, UserDto.UserUpbitKeyReq
         saveUpbitKey(user, encodedAccessKey, encodedSecretKey, encryptedPrivateKey, existUpbitKey);
     }
 
+    // 서비스 약관 동의 여부를 등록하는 메서드
+    @Override
+    public void addUserAgreement(String authorizationHeader) {
+        User user = jwtUtil.getUserFromHeader(authorizationHeader);
+        // 이미 등록한 경우
+        if (user.getIsAgree()) {
+            throw new UserException(UserErrorResult.ALREADY_AGREED);
+        }
+        user.updateAgreement();
+    }
+
     // 암호화 및 인코딩 메서드
     private String encryptAndEncode(String data, KeyPair keyPair) {
         byte[] encryptedData = encryptionUtil.encrypt(data.getBytes(), keyPair.getPublic());
diff --git a/backend/src/main/resources/data.sql b/backend/src/main/resources/data.sql
index 394b0de..5c2936f 100644
--- a/backend/src/main/resources/data.sql
+++ b/backend/src/main/resources/data.sql
@@ -15,8 +15,8 @@ INSERT INTO candles (candles_id, candles_name, korean_name) VALUES
 ON DUPLICATE KEY UPDATE candles_id = candles_id;
 
 -- 테스트 유저 삽입
-INSERT INTO users (users_id, name, provider, provider_id, users_uuid, created_at, updated_at)
-VALUES (1, '테스트1', 'kakao', '3471511962', UNHEX(REPLACE('159f4542-ebff-4acd-a603-a4fb4c94526c', '-', '')), LOCALTIMESTAMP, LOCALTIMESTAMP),
-       (2, '테스트2', 'kakao', '3471511963', UNHEX(REPLACE('159f4542-ebff-4acd-a603-a4fb4c94526d', '-', '')), LOCALTIMESTAMP, LOCALTIMESTAMP),
-       (3, '테스트3', 'kakao', '3471511964', UNHEX(REPLACE('159f4542-ebff-4acd-a603-a4fb4c94526e', '-', '')), LOCALTIMESTAMP, LOCALTIMESTAMP)
+INSERT INTO users (users_id, name, provider, provider_id, users_uuid, is_agree, created_at, updated_at)
+VALUES (1, '테스트1', 'kakao', '3471511962', UNHEX(REPLACE('159f4542-ebff-4acd-a603-a4fb4c94526c', '-', '')), false, LOCALTIMESTAMP, LOCALTIMESTAMP),
+       (2, '테스트2', 'kakao', '3471511963', UNHEX(REPLACE('159f4542-ebff-4acd-a603-a4fb4c94526d', '-', '')), false, LOCALTIMESTAMP, LOCALTIMESTAMP),
+       (3, '테스트3', 'kakao', '3471511964', UNHEX(REPLACE('159f4542-ebff-4acd-a603-a4fb4c94526e', '-', '')), false, LOCALTIMESTAMP, LOCALTIMESTAMP)
 ON DUPLICATE KEY UPDATE name = VALUES(name);
\ No newline at end of file