diff --git a/build.gradle b/build.gradle
index d5984ee..6d267f0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -21,6 +21,8 @@ repositories {
 
 dependencies {
 
+	implementation('org.springframework.boot:spring-boot-starter-security') //security
+	
 	implementation('io.springfox:springfox-swagger2:+')//swagger
 	implementation('io.springfox:springfox-swagger-ui:+')
 
diff --git a/src/main/java/org/dailystudio/sbs/api/AccountController.java b/src/main/java/org/dailystudio/sbs/api/AccountController.java
new file mode 100644
index 0000000..91c907b
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/api/AccountController.java
@@ -0,0 +1,56 @@
+package org.dailystudio.sbs.api;
+
+import lombok.RequiredArgsConstructor;
+import org.dailystudio.sbs.dto.*;
+import org.dailystudio.sbs.service.AccountService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/account")     //경로
+@RequiredArgsConstructor
+public class AccountController {
+
+    private final AccountService accountService;
+
+    @PostMapping("/login")
+    public ResponseEntity<AccountResDto> loginAccount(@RequestBody AccountLoginReqDto accountLoginReqDto) {
+        AccountResDto accountResDto = accountService.login(accountLoginReqDto);
+        return ResponseEntity.ok().body(accountResDto);
+    }
+
+
+    @PostMapping("/signUp")
+    public ResponseEntity<Boolean> signAccount(@RequestBody AccountSignUpReqDto accountSignUpReqDto) {
+
+        boolean flag = accountService.signUp(accountSignUpReqDto);
+        return ResponseEntity.ok(flag);
+    }
+
+    @GetMapping("/findByUsingEmail/{email}")
+    public ResponseEntity<AccountResDto> findEmailAccount(@PathVariable("email") String email) {
+
+        AccountResDto accountResDto = accountService.findAccountByUsingEmail(email);
+        return ResponseEntity.ok().body(accountResDto);
+    }
+
+
+    @PutMapping("/changName/{modifiedUserName}")
+    public ResponseEntity<AccountChangeNameResDto> changeNameAccount(@PathVariable String modifiedUserNAME, @RequestBody AccountChangeNameReqDto accountChangeNameReqDto) {
+
+        AccountChangeNameResDto accountChangeNameResDto = accountService.changeName(modifiedUserNAME, accountChangeNameReqDto);
+        //성공적으로 바뀌었으면 바뀐이름 리턴
+        return ResponseEntity.ok().body(accountChangeNameResDto);
+    }
+
+    //요청할게 없어서? 안에 안넣었습니다
+    @GetMapping("/returnAllUser")
+    public ResponseEntity<AccountFindAllUserDto> returnAllUserAccount() {
+
+        AccountFindAllUserDto accountFindAllUserDto = accountService.findAllUser();
+        return ResponseEntity.ok().body(accountFindAllUserDto);
+    }
+
+
+
+}
diff --git a/src/main/java/org/dailystudio/sbs/config/SecurityConfig.java b/src/main/java/org/dailystudio/sbs/config/SecurityConfig.java
new file mode 100644
index 0000000..3044365
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/config/SecurityConfig.java
@@ -0,0 +1,30 @@
+package org.dailystudio.sbs.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+
+@Configuration
+public class SecurityConfig extends WebSecurityConfigurerAdapter {
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http.
+                authorizeRequests()
+                .antMatchers("/h2/*")
+                .permitAll()
+                .and()
+                .csrf().disable()
+                .headers()
+                .frameOptions()
+                .disable();
+    }
+
+    @Bean
+    public BCryptPasswordEncoder bCryptPasswordEncoder() {
+        return new BCryptPasswordEncoder();
+    }
+
+}
\ No newline at end of file
diff --git a/src/main/java/org/dailystudio/sbs/config/SwaggerConfig.java b/src/main/java/org/dailystudio/sbs/config/SwaggerConfig.java
index d42a5f1..65c8db9 100644
--- a/src/main/java/org/dailystudio/sbs/config/SwaggerConfig.java
+++ b/src/main/java/org/dailystudio/sbs/config/SwaggerConfig.java
@@ -17,7 +17,7 @@ public Docket api() {
         return new Docket(DocumentationType.SWAGGER_2)
                 .select()
                 .apis(RequestHandlerSelectors.any()) // 현재 RequestMapping으로 할당된 모든 URL 리스트를 추출
-                .paths(PathSelectors.ant("/api/**")) // 그중 /api/** 인 URL들만 필터링
+                .paths(PathSelectors.ant("/account/**")) // 그중 /api/** 인 URL들만 필터링
                 .build();
     }
 
diff --git a/src/main/java/org/dailystudio/sbs/domain/Account.java b/src/main/java/org/dailystudio/sbs/domain/Account.java
new file mode 100644
index 0000000..92c5974
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/domain/Account.java
@@ -0,0 +1,37 @@
+package org.dailystudio.sbs.domain;
+
+
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import javax.persistence.*;
+
+@Entity
+@NoArgsConstructor
+@Table(name = "account")
+@Getter
+public class Account {
+
+    @Id //프라이머리 키
+    @GeneratedValue(strategy = GenerationType.AUTO) //전략을 정해주는거
+    @Column(name = "account_id") //데이터베이스에 저장되는이름
+    private Long id;
+
+    @Column(name = "account_email", unique = true, nullable =  false)
+    private String email;
+
+    @Column(name = "account_name", nullable =  false)
+    private String name;
+
+    @Column(name = "account_pass", nullable =  false)
+    private String pass;
+
+    public Account(String email, String name, String pass) {
+        this.email = email;
+        this.name = name;
+        this.pass = pass;
+    }
+
+
+
+}
diff --git a/src/main/java/org/dailystudio/sbs/dto/AccountChangeNameReqDto.java b/src/main/java/org/dailystudio/sbs/dto/AccountChangeNameReqDto.java
new file mode 100644
index 0000000..0610fcf
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/dto/AccountChangeNameReqDto.java
@@ -0,0 +1,12 @@
+package org.dailystudio.sbs.dto;
+
+import lombok.Getter;
+
+@Getter
+public class AccountChangeNameReqDto {
+
+    private String email;
+    private String name;
+    private String pass;
+}
+
diff --git a/src/main/java/org/dailystudio/sbs/dto/AccountChangeNameResDto.java b/src/main/java/org/dailystudio/sbs/dto/AccountChangeNameResDto.java
new file mode 100644
index 0000000..05bdb3c
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/dto/AccountChangeNameResDto.java
@@ -0,0 +1,12 @@
+package org.dailystudio.sbs.dto;
+
+import lombok.Getter;
+
+@Getter
+public class AccountChangeNameResDto {
+  private String name;
+
+    public AccountChangeNameResDto(String name) {
+        this.name= name;
+    }
+}
diff --git a/src/main/java/org/dailystudio/sbs/dto/AccountFindAccountByUsingEmailReqDto.java b/src/main/java/org/dailystudio/sbs/dto/AccountFindAccountByUsingEmailReqDto.java
new file mode 100644
index 0000000..0ffba06
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/dto/AccountFindAccountByUsingEmailReqDto.java
@@ -0,0 +1,8 @@
+package org.dailystudio.sbs.dto;
+
+import lombok.Getter;
+
+@Getter
+public class AccountFindAccountByUsingEmailReqDto {
+    private String email;
+}
diff --git a/src/main/java/org/dailystudio/sbs/dto/AccountFindAllUserDto.java b/src/main/java/org/dailystudio/sbs/dto/AccountFindAllUserDto.java
new file mode 100644
index 0000000..ebd2471
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/dto/AccountFindAllUserDto.java
@@ -0,0 +1,17 @@
+package org.dailystudio.sbs.dto;
+
+import lombok.Getter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Getter
+public class AccountFindAllUserDto {
+
+  private List<AccountResDto> accounts = new ArrayList<>();
+
+    public AccountFindAllUserDto(List<AccountResDto> accounts) {
+
+        this.accounts= accounts;
+    }
+}
diff --git a/src/main/java/org/dailystudio/sbs/dto/AccountLoginReqDto.java b/src/main/java/org/dailystudio/sbs/dto/AccountLoginReqDto.java
new file mode 100644
index 0000000..ce911b3
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/dto/AccountLoginReqDto.java
@@ -0,0 +1,9 @@
+package org.dailystudio.sbs.dto;
+
+import lombok.Getter;
+
+@Getter
+public class AccountLoginReqDto {
+    private String email;
+    private String pass;
+}
diff --git a/src/main/java/org/dailystudio/sbs/dto/AccountResDto.java b/src/main/java/org/dailystudio/sbs/dto/AccountResDto.java
new file mode 100644
index 0000000..5c4863b
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/dto/AccountResDto.java
@@ -0,0 +1,16 @@
+package org.dailystudio.sbs.dto;
+
+import lombok.Getter;
+
+@Getter
+public class AccountResDto {
+  //이메일이랑 이름만 !
+   private String email;
+   private String name;
+
+
+    public AccountResDto(String email, String name) {
+        this.email = email;
+        this.name= name;
+    }
+}
diff --git a/src/main/java/org/dailystudio/sbs/dto/AccountSignUpReqDto.java b/src/main/java/org/dailystudio/sbs/dto/AccountSignUpReqDto.java
new file mode 100644
index 0000000..9b92ee8
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/dto/AccountSignUpReqDto.java
@@ -0,0 +1,28 @@
+package org.dailystudio.sbs.dto;
+
+import lombok.Getter;
+import org.dailystudio.sbs.domain.Account;
+import org.springframework.security.crypto.password.PasswordEncoder;
+
+@Getter
+public class AccountSignUpReqDto {
+   //가입하기 위해 받는정보에는 id가필요없다. 데이터베이스에 저장할때 자동저장.
+    // private Long id;
+    private String email;
+    private String name;
+    private String pass;
+
+    public Account toAccountEntity(PasswordEncoder passwordEncoder) {
+        String encodedPassword = passwordEncoder.encode(pass);
+        return new Account(email, name, encodedPassword);
+    }
+/*
+    public Account toEntity(PasswordEncoder passwordEncoder) {
+
+        return Account.builder()
+                .email(this.email)
+                .pass(passwordEncoder.encode(this.pass))
+                .build();
+    }*/
+}
+
diff --git a/src/main/java/org/dailystudio/sbs/repository/AccountRepository.java b/src/main/java/org/dailystudio/sbs/repository/AccountRepository.java
new file mode 100644
index 0000000..c77f835
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/repository/AccountRepository.java
@@ -0,0 +1,8 @@
+package org.dailystudio.sbs.repository;
+
+import org.dailystudio.sbs.domain.Account;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface AccountRepository extends JpaRepository<Account, Long> {
+    Account findByEmail(String email);
+}
diff --git a/src/main/java/org/dailystudio/sbs/service/AccountService.java b/src/main/java/org/dailystudio/sbs/service/AccountService.java
new file mode 100644
index 0000000..44966f3
--- /dev/null
+++ b/src/main/java/org/dailystudio/sbs/service/AccountService.java
@@ -0,0 +1,136 @@
+package org.dailystudio.sbs.service;
+
+
+import com.fasterxml.jackson.databind.util.BeanUtil;
+import lombok.RequiredArgsConstructor;
+import org.dailystudio.sbs.domain.Account;
+import org.dailystudio.sbs.dto.*;
+import org.dailystudio.sbs.repository.AccountRepository;
+import org.springframework.beans.BeanUtils;
+import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+    public class AccountService {
+
+    private final AccountRepository accountRepository;
+    private final BCryptPasswordEncoder bCryptPasswordEncoder;
+
+
+    @Transactional
+    public boolean signUp(AccountSignUpReqDto accountSignUpReqDto)
+    {
+
+        String email = accountSignUpReqDto.getEmail();
+        String pass = accountSignUpReqDto.getPass();
+        String name = accountSignUpReqDto.getName();
+
+        //
+        if(accountRepository.findByEmail(email) != null)
+        {
+            return false;
+        }
+        Account account = accountSignUpReqDto.toAccountEntity(bCryptPasswordEncoder);
+        accountRepository.save(account);
+        return true;
+
+    }
+
+    @Transactional
+    public AccountResDto login(AccountLoginReqDto accountLoginReqDto) {
+
+        String email = accountLoginReqDto.getEmail();
+
+        Account account = accountRepository.findByEmail(email);
+
+        //그런 이메일을 가진 객체가 없다면 null반환
+        if (account == null) {
+            return null;
+        }
+        //비밀번호를 복호화한 비밀번호와 같다면 그 객체를 반환
+        if(bCryptPasswordEncoder.matches(accountLoginReqDto.getPass(), account.getPass()))
+        {
+            AccountResDto accountResDto = new AccountResDto(account.getEmail(), account.getName());
+            return accountResDto;
+        }
+
+        //비번이랑 같지않아요~
+        return null;
+    }
+
+
+     @Transactional
+    public AccountResDto findAccountByUsingEmail(String email) {
+
+        Account account = accountRepository.findByEmail(email);
+        if (account == null) {
+            return null;
+        }
+
+        AccountResDto accountResDto = new AccountResDto(account.getEmail(), account.getName());
+
+        return accountResDto;
+    }
+
+    @Transactional
+    public AccountChangeNameResDto changeName(String modifiedUserName, AccountChangeNameReqDto accountChangeNameReqDto) {
+
+
+         String name = accountChangeNameReqDto.getName();
+        String email = accountChangeNameReqDto.getEmail();
+        String pass =  accountChangeNameReqDto.getPass();
+        String input_name = modifiedUserName;
+
+        Account account = accountRepository.findByEmail(email);
+
+        if(account == null)
+        {
+            return null;
+        }
+        if (!account.getEmail().equals(email)) {
+            return null;
+        }
+        if (!account.getPass().equals(pass)) {
+            return null;
+        }
+        if (!account.getName().equals(name)) {
+            return null;
+        }
+        AccountChangeNameResDto accountChangeNameResDto = new AccountChangeNameResDto(input_name);
+
+       //삭제하고 다시넣어주나?
+        accountRepository.deleteById(account.getId());
+        //이쪽까지오면 다 같으니거니까!
+        Account modified_account = new Account(email,pass,name);
+        accountRepository.save(modified_account);
+
+        //바뀐이름만 리턴
+        return accountChangeNameResDto;
+
+    }
+
+    @Transactional
+    public AccountFindAllUserDto findAllUser() {
+
+        List<Account> accounts = accountRepository.findAll();
+        List<AccountResDto> accountResDtoList = new ArrayList<>();
+
+        //AccountFindAllUserDto의 매개변수로 들어갈, ResDtoList를 만들자
+        for(Account account_index : accounts)
+        {
+            AccountResDto accountResDto = new AccountResDto(account_index.getEmail(), account_index.getName());
+            accountResDtoList.add(accountResDto);
+        }
+
+        AccountFindAllUserDto accountFindAllUserDto = new AccountFindAllUserDto(accountResDtoList);
+
+
+        return accountFindAllUserDto;
+    }
+
+}