diff --git a/src/main/java/com/yam/app/account/application/AccountFacade.java b/src/main/java/com/yam/app/account/application/AccountFacade.java
index 9a077e4..0e85c1b 100644
--- a/src/main/java/com/yam/app/account/application/AccountFacade.java
+++ b/src/main/java/com/yam/app/account/application/AccountFacade.java
@@ -38,9 +38,8 @@ public class AccountFacade {
 
     @Transactional
     public void register(RegisterAccountCommand command) {
-        var entity = registerProcessor.process(
+        var entity = registerProcessor.register(
             command.getEmail(),
-            command.getNickname(),
             command.getPassword()
         );
         publisher.publishEvent(new RegisterAccountEvent(entity));
diff --git a/src/main/java/com/yam/app/account/application/AccountTranslator.java b/src/main/java/com/yam/app/account/application/AccountTranslator.java
index 3c7340d..f86630b 100644
--- a/src/main/java/com/yam/app/account/application/AccountTranslator.java
+++ b/src/main/java/com/yam/app/account/application/AccountTranslator.java
@@ -9,6 +9,7 @@ final class AccountTranslator {
 
     public AccountResponse toResponse(Account entity) {
         return new AccountResponse(entity.getId(), entity.getEmail(),
-            entity.getNickname());
+            entity.isEmailVerified(), entity.getJoinedAt(), entity.getLastModifiedAt(),
+            entity.getWithdrawalAt(), entity.isWithdraw(), entity.getRole().name());
     }
 }
diff --git a/src/main/java/com/yam/app/account/domain/Account.java b/src/main/java/com/yam/app/account/domain/Account.java
index 8af4af4..6b90b78 100644
--- a/src/main/java/com/yam/app/account/domain/Account.java
+++ b/src/main/java/com/yam/app/account/domain/Account.java
@@ -11,7 +11,6 @@ public final class Account {
 
     private Long id;
     private String email;
-    private String nickname;
     private String password;
     private String emailCheckToken;
     private LocalDateTime emailCheckTokenGeneratedAt;
@@ -22,15 +21,14 @@ public final class Account {
     private boolean withdraw = false;
     private Role role;
 
-    private Account(String email, String nickname, String password) {
+    private Account(String email, String password) {
         this.email = email;
-        this.nickname = nickname;
         this.password = password;
         this.role = Role.DEFAULT;
     }
 
-    public static Account of(String email, String nickname, String password) {
-        Account account = new Account(email, nickname, password);
+    public static Account of(String email, String password) {
+        Account account = new Account(email, password);
         account.generateEmailCheckToken();
         return account;
     }
diff --git a/src/main/java/com/yam/app/account/domain/AccountReader.java b/src/main/java/com/yam/app/account/domain/AccountReader.java
index 49a9b77..85428c4 100644
--- a/src/main/java/com/yam/app/account/domain/AccountReader.java
+++ b/src/main/java/com/yam/app/account/domain/AccountReader.java
@@ -6,7 +6,5 @@ public interface AccountReader {
 
     boolean existsByEmail(String email);
 
-    boolean existsByNickname(String nickname);
-
     Optional<Account> findByEmail(String email);
 }
diff --git a/src/main/java/com/yam/app/account/domain/RegisterAccountProcessor.java b/src/main/java/com/yam/app/account/domain/RegisterAccountProcessor.java
index 9c3b894..d82a21a 100644
--- a/src/main/java/com/yam/app/account/domain/RegisterAccountProcessor.java
+++ b/src/main/java/com/yam/app/account/domain/RegisterAccountProcessor.java
@@ -15,17 +15,14 @@ public final class RegisterAccountProcessor {
         this.passwordEncrypter = passwordEncrypter;
     }
 
-    public Account process(String email, String nickname, String password) {
+    public Account register(String email, String password) {
         if (accountReader.existsByEmail(email)) {
             throw new DuplicateValueException(email);
         }
-        if (accountReader.existsByNickname(nickname)) {
-            throw new DuplicateValueException(nickname);
-        }
 
         String encodedPassword = passwordEncrypter.encode(password);
 
-        accountRepository.save(Account.of(email, nickname, encodedPassword));
+        accountRepository.save(Account.of(email, encodedPassword));
         return accountReader.findByEmail(email)
             .orElseThrow(() -> new AccountNotFoundException(email));
     }
diff --git a/src/main/java/com/yam/app/account/infrastructure/MailManager.java b/src/main/java/com/yam/app/account/infrastructure/MailManager.java
index d17a504..7e3e165 100644
--- a/src/main/java/com/yam/app/account/infrastructure/MailManager.java
+++ b/src/main/java/com/yam/app/account/infrastructure/MailManager.java
@@ -28,7 +28,8 @@ final class MailManager {
         context.setVariable("link",
             "/api/accounts/authorize?token=" + newAccount.getEmailCheckToken()
                 + "&email=" + newAccount.getEmail());
-        context.setVariable("nickname", newAccount.getNickname());
+        var username = newAccount.getEmail().split("@")[0];
+        context.setVariable("username", username);
         context.setVariable("linkName", "이메일 인증하기");
         context.setVariable("message", "YouAndMe 서비스를 사용하려면 링크를 클릭하세요.");
         context.setVariable("host", host);
diff --git a/src/main/java/com/yam/app/account/infrastructure/MybatisAccountRepository.java b/src/main/java/com/yam/app/account/infrastructure/MybatisAccountRepository.java
index 18bfe9d..3b8065c 100644
--- a/src/main/java/com/yam/app/account/infrastructure/MybatisAccountRepository.java
+++ b/src/main/java/com/yam/app/account/infrastructure/MybatisAccountRepository.java
@@ -31,11 +31,6 @@ public final class MybatisAccountRepository implements AccountRepository, Accoun
         }
     }
 
-    @Override
-    public boolean existsByNickname(String nickname) {
-        return template.getMapper(AccountReader.class).existsByNickname(nickname);
-    }
-
     @Override
     public void save(Account entity) {
         int result = template.insert(SAVE_FQCN, entity);
diff --git a/src/main/java/com/yam/app/account/presentation/AccountResponse.java b/src/main/java/com/yam/app/account/presentation/AccountResponse.java
index ccc98bc..d91ae86 100644
--- a/src/main/java/com/yam/app/account/presentation/AccountResponse.java
+++ b/src/main/java/com/yam/app/account/presentation/AccountResponse.java
@@ -1,5 +1,6 @@
 package com.yam.app.account.presentation;
 
+import java.time.LocalDateTime;
 import lombok.Getter;
 
 @Getter
@@ -7,11 +8,23 @@ public final class AccountResponse {
 
     private final Long id;
     private final String email;
-    private final String nickname;
+    private final boolean emailVerified;
+    private final LocalDateTime joinedAt;
+    private final LocalDateTime lastModifiedAt;
+    private final LocalDateTime withdrawalAt;
+    private final boolean withdraw;
+    private final String role;
 
-    public AccountResponse(Long id, String email, String nickname) {
+    public AccountResponse(Long id, String email, boolean emailVerified,
+        LocalDateTime joinedAt, LocalDateTime lastModifiedAt, LocalDateTime withdrawalAt,
+        boolean withdraw, String role) {
         this.id = id;
         this.email = email;
-        this.nickname = nickname;
+        this.emailVerified = emailVerified;
+        this.joinedAt = joinedAt;
+        this.lastModifiedAt = lastModifiedAt;
+        this.withdrawalAt = withdrawalAt;
+        this.withdraw = withdraw;
+        this.role = role;
     }
 }
diff --git a/src/main/java/com/yam/app/account/presentation/RegisterAccountCommand.java b/src/main/java/com/yam/app/account/presentation/RegisterAccountCommand.java
index a4b1e0d..12271d1 100644
--- a/src/main/java/com/yam/app/account/presentation/RegisterAccountCommand.java
+++ b/src/main/java/com/yam/app/account/presentation/RegisterAccountCommand.java
@@ -12,9 +12,6 @@ public final class RegisterAccountCommand {
     @NotBlank
     private String email;
 
-    @NotBlank
-    private String nickname;
-
     @NotBlank
     @Pattern(regexp = "^[A-Za-z1-9~!@#$%^&*()+|=]{8,12}$",
         message = "Please enter the password in English, numbers, "
diff --git a/src/main/resources/mapper/xml/AccountCommandMapper.xml b/src/main/resources/mapper/xml/AccountCommandMapper.xml
index 3ffc585..5df1aac 100644
--- a/src/main/resources/mapper/xml/AccountCommandMapper.xml
+++ b/src/main/resources/mapper/xml/AccountCommandMapper.xml
@@ -8,7 +8,6 @@
         email_check_token = #{emailCheckToken},
         email_check_token_generated_at = #{emailCheckTokenGeneratedAt},
         email_verified = #{emailVerified},
-        nickname = #{nickname},
         password = #{password},
         withdraw = #{withdraw},
         joined_at = #{joinedAt},
@@ -20,9 +19,9 @@
   <insert id="save" parameterType="com.yam.app.account.domain.Account">
     INSERT
     INTO ACCOUNT(email, email_check_token, email_check_token_generated_at, email_verified,
-                 nickname, password, withdraw, role)
+                 password, withdraw, role)
     VALUES (#{email}, #{emailCheckToken}, #{emailCheckTokenGeneratedAt}, #{emailVerified},
-            #{nickname}, #{password}, #{withdraw}, #{role})
+            #{password}, #{withdraw}, #{role})
   </insert>
 
 </mapper>
diff --git a/src/main/resources/sql/ddl.sql b/src/main/resources/sql/ddl.sql
index f07d787..a0e4fb2 100644
--- a/src/main/resources/sql/ddl.sql
+++ b/src/main/resources/sql/ddl.sql
@@ -8,7 +8,6 @@ create table account
     joined_at                      timestamp,
     last_modified_at               timestamp,
     role                           varchar(255) not null,
-    nickname                       varchar(255) not null,
     password                       varchar(255) not null,
     withdraw                       boolean      not null,
     withdrawal_at                  timestamp,
@@ -17,13 +16,11 @@ create table account
 
 alter table account
     add constraint UK_q0uja26qgu1atulenwup9rxyr unique (email);
-alter table account
-    add constraint UK_s2a5omeaik0sruawqpvs18qfk unique (nickname);
 
 insert into account(email, email_check_token, email_check_token_generated_at, email_verified,
-                    joined_at, last_modified_at, nickname, password, withdraw, role)
-values ('jiwonDev@gmail.com', 'emailchecktoken', now(), false, now(), now(), 'jiwon', 'password!',
+                    joined_at, last_modified_at, password, withdraw, role)
+values ('jiwonDev@gmail.com', 'emailchecktoken', now(), false, now(), now(), 'password!',
         false, 'DEFAULT'),
-       ('loginCheck@gmail.com', 'emailchecktoken1', now(), true, now(), now(), 'loginCheck',
+       ('loginCheck@gmail.com', 'emailchecktoken1', now(), true, now(), now(),
         '$2a$10$EqbMbYB0vcZnuA5CClqa9uiLDnjA6pCjxn208ZchzA2q3ofqnkhcq',
         false, 'DEFAULT');
diff --git a/src/main/resources/templates/mail/check-token.html b/src/main/resources/templates/mail/check-token.html
index 7920e03..bc8e4a6 100644
--- a/src/main/resources/templates/mail/check-token.html
+++ b/src/main/resources/templates/mail/check-token.html
@@ -6,7 +6,7 @@
 </head>
 <body>
 <div>
-  <p>안녕하세요. <span th:text="${nickname}"></span>님</p>
+  <p>안녕하세요. <span th:text="${username}"></span>님</p>
 
   <h2 th:text="${message}">메시지</h2>
 
diff --git a/src/test/java/com/yam/app/account/domain/ConfirmRegisterAccountProcessorTest.java b/src/test/java/com/yam/app/account/domain/ConfirmRegisterAccountProcessorTest.java
index bc03846..693148b 100644
--- a/src/test/java/com/yam/app/account/domain/ConfirmRegisterAccountProcessorTest.java
+++ b/src/test/java/com/yam/app/account/domain/ConfirmRegisterAccountProcessorTest.java
@@ -22,7 +22,7 @@ final class ConfirmRegisterAccountProcessorTest {
         final var confirmRegisterAccountProcessor = new ConfirmRegisterAccountProcessor(
             accountReader, accountRepository, tokenVerifier);
 
-        accountRepository.save(Account.of("jiwonDev@gmail.com", "jiwon", "password!"));
+        accountRepository.save(Account.of("jiwonDev@gmail.com", "password!"));
         final var account = accountReader.findByEmail("jiwonDev@gmail.com").get();
 
         return Arrays.asList(
diff --git a/src/test/java/com/yam/app/account/domain/FakeAccountRepository.java b/src/test/java/com/yam/app/account/domain/FakeAccountRepository.java
index 920af5d..160d280 100644
--- a/src/test/java/com/yam/app/account/domain/FakeAccountRepository.java
+++ b/src/test/java/com/yam/app/account/domain/FakeAccountRepository.java
@@ -28,12 +28,6 @@ public final class FakeAccountRepository implements AccountRepository, AccountRe
         data.putIfAbsent(entity.getId(), entity);
     }
 
-    @Override
-    public boolean existsByNickname(String nickname) {
-        return data.values().stream()
-            .anyMatch(account -> account.getNickname().equals(nickname));
-    }
-
     @Override
     public void save(Account entity) {
         entity.setId(idGenerator.incrementAndGet());
diff --git a/src/test/java/com/yam/app/account/domain/RegisterAccountProcessorTest.java b/src/test/java/com/yam/app/account/domain/RegisterAccountProcessorTest.java
index fee95a5..03e46b6 100644
--- a/src/test/java/com/yam/app/account/domain/RegisterAccountProcessorTest.java
+++ b/src/test/java/com/yam/app/account/domain/RegisterAccountProcessorTest.java
@@ -24,7 +24,7 @@ final class RegisterAccountProcessorTest {
         return Arrays.asList(
             DynamicTest.dynamicTest("회원가입에 성공한다.", () -> {
                 // Act
-                var account = processor.process("rebwon@gmail.com", "rebwon", "password!");
+                var account = processor.register("rebwon@gmail.com", "password!");
 
                 // Assert
                 assertThat(account.getId()).isEqualTo(1L);
@@ -32,12 +32,7 @@ final class RegisterAccountProcessorTest {
             DynamicTest.dynamicTest("이메일 검증에 실패하여 예외를 리턴한다.", () -> {
                 // Act & Assert
                 assertThatExceptionOfType(DuplicateValueException.class)
-                    .isThrownBy(() -> processor.process("rebwon@gmail.com", "rebwon", "password!"));
-            }),
-            DynamicTest.dynamicTest("닉네임 검증에 실패하여 예외를 리턴한다.", () -> {
-                // Act & Assert
-                assertThatExceptionOfType(DuplicateValueException.class)
-                    .isThrownBy(() -> processor.process("kitty@gmail.com", "rebwon", "password!"));
+                    .isThrownBy(() -> processor.register("rebwon@gmail.com", "password!"));
             })
         );
     }
diff --git a/src/test/java/com/yam/app/account/domain/TokenVerifierTest.java b/src/test/java/com/yam/app/account/domain/TokenVerifierTest.java
index e78f509..e4c7a1d 100644
--- a/src/test/java/com/yam/app/account/domain/TokenVerifierTest.java
+++ b/src/test/java/com/yam/app/account/domain/TokenVerifierTest.java
@@ -15,7 +15,7 @@ final class TokenVerifierTest {
         //Arrange
         var accountRepository = new FakeAccountRepository();
         var tokenVerifier = new TokenVerifier(accountRepository);
-        accountRepository.save(Account.of("jiwon@gmail.com", "jiwon", "password!"));
+        accountRepository.save(Account.of("jiwon@gmail.com", "password!"));
         var account = accountRepository.findByEmail("jiwon@gmail.com").get();
 
         //Act
diff --git a/src/test/java/com/yam/app/account/infrastructure/SessionBasedLoginAccountProcessorTest.java b/src/test/java/com/yam/app/account/infrastructure/SessionBasedLoginAccountProcessorTest.java
index 87bf6a6..7f8a52c 100644
--- a/src/test/java/com/yam/app/account/infrastructure/SessionBasedLoginAccountProcessorTest.java
+++ b/src/test/java/com/yam/app/account/infrastructure/SessionBasedLoginAccountProcessorTest.java
@@ -25,10 +25,8 @@ final class SessionBasedLoginAccountProcessorTest {
         var fakeObject = new FakeAccountRepository();
         final var accountRepository = fakeObject;
         final var accountReader = fakeObject;
-        var accountNotYetConfirm = Account.of("hello1@naver.com", "hello1",
-            "password!");
-        var accountCompleted = Account.of("hello@naver.com", "hello",
-            "password!");
+        var accountNotYetConfirm = Account.of("hello1@naver.com", "password!");
+        var accountCompleted = Account.of("hello@naver.com", "password!");
         accountCompleted.completeRegister();
         accountRepository.save(accountCompleted);
         accountRepository.save(accountNotYetConfirm);
diff --git a/src/test/java/com/yam/app/account/integration/AccountIntegrationTests.java b/src/test/java/com/yam/app/account/integration/AccountIntegrationTests.java
index 1471c41..0b951e4 100644
--- a/src/test/java/com/yam/app/account/integration/AccountIntegrationTests.java
+++ b/src/test/java/com/yam/app/account/integration/AccountIntegrationTests.java
@@ -57,7 +57,6 @@ final class AccountIntegrationTests {
         // Arrange
         var command = new RegisterAccountCommand();
         command.setEmail("msolo021015@gmail.com");
-        command.setNickname("rebwon");
         command.setPassword("password!");
 
         // Act
@@ -100,6 +99,7 @@ final class AccountIntegrationTests {
         command.setEmail("loginCheck@gmail.com");
         command.setPassword("password!");
 
+        // Act & Assert
         mockMvc.perform(post(LOGIN)
                 .accept(MediaType.APPLICATION_JSON)
                 .contentType(MediaType.APPLICATION_JSON)
@@ -119,7 +119,9 @@ final class AccountIntegrationTests {
                         .andExpect(jsonPath("$.message").doesNotExist())
                         .andExpect(jsonPath("$.data.id").isNumber())
                         .andExpect(jsonPath("$.data.email").isString())
-                        .andExpect(jsonPath("$.data.nickname").isString());
+                        .andExpect(jsonPath("$.data.emailVerified").value(true))
+                        .andExpect(jsonPath("$.data.withdraw").value(false))
+                        .andExpect(jsonPath("$.data.role").value("DEFAULT"));
                 });
     }
 
diff --git a/src/test/java/com/yam/app/account/presentation/AccountCommandApiTests.java b/src/test/java/com/yam/app/account/presentation/AccountCommandApiTests.java
index 41ae3f5..283bc4b 100644
--- a/src/test/java/com/yam/app/account/presentation/AccountCommandApiTests.java
+++ b/src/test/java/com/yam/app/account/presentation/AccountCommandApiTests.java
@@ -188,7 +188,6 @@ final class AccountCommandApiTests {
             // Arrange
             var command = new RegisterAccountCommand();
             command.setEmail(arg);
-            command.setNickname(arg);
             command.setPassword(arg);
 
             // Act
@@ -211,7 +210,6 @@ final class AccountCommandApiTests {
             // Arrange
             var command = new RegisterAccountCommand();
             command.setEmail(arg);
-            command.setNickname(arg);
             command.setPassword(arg);
 
             // Act
@@ -232,7 +230,6 @@ final class AccountCommandApiTests {
             // Arrange
             var command = new RegisterAccountCommand();
             command.setEmail(arg);
-            command.setNickname("jiwon");
             command.setPassword("password1!");
 
             // Act
@@ -253,7 +250,6 @@ final class AccountCommandApiTests {
             // Arrange
             var command = new RegisterAccountCommand();
             command.setEmail("jiwon@naver.com");
-            command.setNickname("jiwon");
             command.setPassword(args);
 
             // Act