diff --git a/Server/src/main/java/com/server/domain/account/domain/Account.java b/Server/src/main/java/com/server/domain/account/domain/Account.java
index 3c5b198a..0798bf71 100644
--- a/Server/src/main/java/com/server/domain/account/domain/Account.java
+++ b/Server/src/main/java/com/server/domain/account/domain/Account.java
@@ -23,22 +23,23 @@ public class Account extends BaseEntity {
 
     private String bank;
 
-    @OneToOne(fetch = FetchType.LAZY)
-    @JoinColumn(name = "member_id")
-    private Member member;
-
-    private Account(String name, String account, String bank, Member member) {
+    private Account(String name, String account, String bank) {
         this.name = name;
         this.account = account;
         this.bank = bank;
-        this.member = member;
     }
 
     public static Account createAccount(String name, String accountNumber, String bank, Member member) {
-        Account account = new Account(name, accountNumber, bank, member);
+        Account account = new Account(name, accountNumber, bank);
 
         member.updateAccount(account);
 
         return account;
     }
+
+    public void updateAccount(String name, String account, String bank) {
+        this.name = name;
+        this.account = account;
+        this.bank = bank;
+    }
 }
diff --git a/Server/src/main/java/com/server/domain/account/repository/AccountRepository.java b/Server/src/main/java/com/server/domain/account/repository/AccountRepository.java
index 238a680f..a9a75dc1 100644
--- a/Server/src/main/java/com/server/domain/account/repository/AccountRepository.java
+++ b/Server/src/main/java/com/server/domain/account/repository/AccountRepository.java
@@ -8,6 +8,6 @@
 
 public interface AccountRepository extends JpaRepository<Account, Long> {
 
-    @Query("select a from Account a where a.member.memberId = :memberId")
+    @Query("select a from Account a join Member m on m.account = a where m.memberId = :memberId")
     Optional<Account> findByMemberId(Long memberId);
 }
\ No newline at end of file
diff --git a/Server/src/main/java/com/server/domain/adjustment/service/AdjustmentService.java b/Server/src/main/java/com/server/domain/adjustment/service/AdjustmentService.java
index fa7e1b90..718896f4 100644
--- a/Server/src/main/java/com/server/domain/adjustment/service/AdjustmentService.java
+++ b/Server/src/main/java/com/server/domain/adjustment/service/AdjustmentService.java
@@ -157,7 +157,10 @@ public void updateAccount(Long loginMemberId, AccountUpdateServiceRequest reques
 
         if(account == null) {
             Member member = verifiedMember(loginMemberId);
-            Account.createAccount(request.getName(), request.getAccount(), request.getBank(), member);
+            Account createdAccount = Account.createAccount(request.getName(), request.getAccount(), request.getBank(), member);
+            accountRepository.save(createdAccount);
+        }else {
+            account.updateAccount(request.getName(), request.getAccount(), request.getBank());
         }
 
     }
diff --git a/Server/src/main/java/com/server/domain/member/entity/Member.java b/Server/src/main/java/com/server/domain/member/entity/Member.java
index da5bab95..7c742b18 100644
--- a/Server/src/main/java/com/server/domain/member/entity/Member.java
+++ b/Server/src/main/java/com/server/domain/member/entity/Member.java
@@ -67,6 +67,7 @@ public class Member extends BaseEntity {
 	private Channel channel;
 
 	@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
+	@JoinColumn(name = "account_id")
 	private Account account;
 
 	@OneToMany(mappedBy = "member", cascade = CascadeType.ALL)
diff --git a/Server/src/test/java/com/server/domain/adjustment/service/AdjustmentServiceTest.java b/Server/src/test/java/com/server/domain/adjustment/service/AdjustmentServiceTest.java
new file mode 100644
index 00000000..0b275f6b
--- /dev/null
+++ b/Server/src/test/java/com/server/domain/adjustment/service/AdjustmentServiceTest.java
@@ -0,0 +1,71 @@
+package com.server.domain.adjustment.service;
+
+import com.server.domain.account.domain.Account;
+import com.server.domain.adjustment.service.dto.request.AccountUpdateServiceRequest;
+import com.server.domain.member.entity.Member;
+import com.server.global.testhelper.ServiceTest;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.DynamicTest;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Optional;
+
+import static org.assertj.core.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.DynamicTest.*;
+
+class AdjustmentServiceTest extends ServiceTest {
+
+    @Autowired AdjustmentService adjustmentService;
+
+    @TestFactory
+    @DisplayName("계좌 정보를 수정한다.")
+    Collection<DynamicTest> updateAccount() {
+        //given
+        Member member = createMemberWithChannel();
+
+        em.flush();
+        em.clear();
+
+        return List.of(
+            dynamicTest("계좌정보가 없다면 생성한다.", ()-> {
+                //given
+                String accountNumber = "123456789";
+                String bank = "신한은행";
+                String name = "홍길동";
+
+                AccountUpdateServiceRequest request = new AccountUpdateServiceRequest(name, accountNumber, bank);
+
+                //when
+                adjustmentService.updateAccount(member.getMemberId(), request);
+
+                //then
+                Account account = accountRepository.findByMemberId(member.getMemberId()).orElseThrow();
+                assertThat(account.getAccount()).isEqualTo(accountNumber);
+            }),
+                dynamicTest("계좌정보가 있다면 수정한다.", ()-> {
+                    //given
+                    String accountNumber = "1234567892";
+                    String bank = "신한은행2";
+                    String name = "홍길동2";
+
+                    AccountUpdateServiceRequest request = new AccountUpdateServiceRequest(name, accountNumber, bank);
+
+                    //when
+                    adjustmentService.updateAccount(member.getMemberId(), request);
+
+                    //then
+                    Account account = accountRepository.findByMemberId(member.getMemberId()).orElseThrow();
+                    assertThat(account.getAccount()).isEqualTo(accountNumber);
+                    assertThat(accountRepository.findAll().size()).isEqualTo(1);
+                })
+        );
+
+
+    }
+}
\ No newline at end of file
diff --git a/Server/src/test/java/com/server/global/testhelper/ServiceTest.java b/Server/src/test/java/com/server/global/testhelper/ServiceTest.java
index 588a5f61..3c999982 100644
--- a/Server/src/test/java/com/server/global/testhelper/ServiceTest.java
+++ b/Server/src/test/java/com/server/global/testhelper/ServiceTest.java
@@ -2,6 +2,7 @@
 
 import com.server.auth.jwt.service.CustomUserDetails;
 import com.server.auth.jwt.service.JwtProvider;
+import com.server.domain.account.repository.AccountRepository;
 import com.server.domain.announcement.repository.AnnouncementRepository;
 import com.server.domain.answer.entity.Answer;
 import com.server.domain.answer.repository.AnswerRepository;
@@ -78,6 +79,7 @@ public abstract class ServiceTest {
     @Autowired protected CartRepository cartRepository;
     @Autowired protected RewardRepository rewardRepository;
     @Autowired protected ReportRepository reportRepository;
+    @Autowired protected AccountRepository accountRepository;
     @Autowired protected EntityManager em;
 
     @MockBean protected RedisService redisService;