diff --git a/week3/seungbeom/.gitignore b/week3/seungbeom/.gitignore
new file mode 100644
index 0000000..c2065bc
--- /dev/null
+++ b/week3/seungbeom/.gitignore
@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/week3/seungbeom/README.md b/week3/seungbeom/README.md
new file mode 100644
index 0000000..07e923a
--- /dev/null
+++ b/week3/seungbeom/README.md
@@ -0,0 +1,43 @@
+## Spring Study 3주차
+### 학습 목표
+- 간단한 회원 생성, 조회 기능을 수행하는 API서버를 만들고 Spring의 전반적인 활용방법과 데이터베이스 연결 방법을 배운다.
+
+### 실습 과정 중 발생한 오류들!
+***
+- H2 데이터베이스 설정 시 jdbc url을 지정해놓고 연결을 누르면 다음과 같은 오류가 발생.
+![스크린샷 2024-09-18 205542](https://github.com/user-attachments/assets/4b5b32d9-50eb-4488-a959-d7128139e2bc)
+- 자동으로 mv.db파일이 생기면서 연결이 가능해야 하지만 불가능했음.
+- 결국 지정 경로에 직접 파일 생성 후 재연결
+![스크린샷 2024-09-18 205948](https://github.com/user-attachments/assets/48c50a97-bd61-4414-b8c4-74b339295fed)
+- 성공!!
+- 그리고 h2 데이터베이스를 실행하지 않고 스프링 프로젝트를 실행 시 데이터베이스를 연결하지 못했다는 에러를 볼 수 있으므로
+실행 전 h2 데이터베이스를 사전에 실행해 놓은 상태인지 확인!
+
+### 실습을 진행하면서 들었던 궁금증들!
+***
+#### 1. 왜 Spring 에서는 프로젝트의 계층을 3가지(Controller, Service, Repository)로 나누어 개발하고 관리하는 것일까?
+- 책임 분리를 통한 유지보수성을 높이기 위함!
+- Controller는 요청과 응답에, Service는 비즈니스 로직에, Repository는 데이터베이스와의 상호작용에 집중하여 독립성을 올리고 결집도를 낮춘다.
+- 책임 분리를 통해 각 계층의 부담을 줄이고 역할에 필요한 코드만을 간결하게 유지
+#### 2. 컨트롤러에서 데이터를 외부로 전달하고 받을 때 DTO형식을 사용하는 이유는 뭘까?
+- 엔티티 자체만으로는 서비스 내 모든 로직들을 감당하기 어렵다.
+- 각 요청에 맞는 데이터 양식들(PK값만 보내기, PK와 이름 OR 전체 데이터까지)을 모두 엔티티에 반영하면 복잡성이 증가하고 유지보수성이 떨어진다.
+- 엔티티를 그대로 노출하게 되면 엔티티가 변경되었을 때 API 스펙 역시 변경되기 때문에 혼란이 발생할 수 있다.
+#### 3. 웹 서비스 내에서 발생한 예외 처리는 어느 계층이 담당해야 할까?
+- 일반적으로 Service 계층과 Controller 계층이 나누어 처리한다.
+- Service 계층에서는 서비스 자체적으로 다루는 비즈니스 로직에서 발생하는 예외와 데이터베이스 처리 과정 중 발생한 예외를 예외 메서지와 상태 코드를
+Controller 계층으로 전달한다.
+- Controller 계층에서는 Service 계층으로부터 넘겨받은 예외 정보를 바탕으로 적절한 HTTP 상태코드와 메세지를 클라이언트에게 전달한다.
+
+### API 테스트 화면 
+***
+#### 1. 멤버 생성([POST] /members)
+![스크린샷 2024-09-18 211240](https://github.com/user-attachments/assets/0f7249cb-70b4-4925-9160-eb96dc44e156)
+#### 2. 전체 멤버 조회([GET] /members)
+![스크린샷 2024-09-18 211352](https://github.com/user-attachments/assets/dad226f4-054b-4ff9-82e5-4efe974f58c7)
+#### 2-1. 전체 멤버 조회 실패(데이터베이스에 멤버가 존재하지 않는 경우)
+![스크린샷 2024-09-18 211729](https://github.com/user-attachments/assets/12609e4c-a4fc-4b24-8b54-9a89db6cf76f)
+#### 3. 멤버 단건 조회([GET] /members/{memberId})
+![스크린샷 2024-09-18 211456](https://github.com/user-attachments/assets/eb118f1b-f3e6-4be0-b7e8-ec7b1f8a1359)
+#### 3-1. 멤버 단건 조회 실패(없는 멤버의 pk를 쿼리 스트링으로 넘겼을 때)
+![스크린샷 2024-09-18 211633](https://github.com/user-attachments/assets/a7aa19b7-cc98-4bde-b1d9-6b672fd5923e)
\ No newline at end of file
diff --git a/week3/seungbeom/build.gradle b/week3/seungbeom/build.gradle
new file mode 100644
index 0000000..b25db66
--- /dev/null
+++ b/week3/seungbeom/build.gradle
@@ -0,0 +1,38 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.3.3'
+	id 'io.spring.dependency-management' version '1.1.6'
+}
+
+group = 'Spring-Study'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	toolchain {
+		languageVersion = JavaLanguageVersion.of(17)
+	}
+}
+
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	compileOnly 'org.projectlombok:lombok'
+	runtimeOnly 'com.h2database:h2'
+	annotationProcessor 'org.projectlombok:lombok'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}
diff --git a/week3/seungbeom/gradle/wrapper/gradle-wrapper.jar b/week3/seungbeom/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..a4b76b9
Binary files /dev/null and b/week3/seungbeom/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/week3/seungbeom/gradle/wrapper/gradle-wrapper.properties b/week3/seungbeom/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..0aaefbc
--- /dev/null
+++ b/week3/seungbeom/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/week3/seungbeom/gradlew b/week3/seungbeom/gradlew
new file mode 100644
index 0000000..f5feea6
--- /dev/null
+++ b/week3/seungbeom/gradlew
@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/week3/seungbeom/gradlew.bat b/week3/seungbeom/gradlew.bat
new file mode 100644
index 0000000..9d21a21
--- /dev/null
+++ b/week3/seungbeom/gradlew.bat
@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/week3/seungbeom/settings.gradle b/week3/seungbeom/settings.gradle
new file mode 100644
index 0000000..0afd8de
--- /dev/null
+++ b/week3/seungbeom/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'mutsa-study'
diff --git a/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/MutsaStudyApplication.java b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/MutsaStudyApplication.java
new file mode 100644
index 0000000..59f8780
--- /dev/null
+++ b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/MutsaStudyApplication.java
@@ -0,0 +1,13 @@
+package Spring_Study.mutsa_study;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MutsaStudyApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(MutsaStudyApplication.class, args);
+	}
+
+}
diff --git a/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/controller/MemberController.java b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/controller/MemberController.java
new file mode 100644
index 0000000..abc1d75
--- /dev/null
+++ b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/controller/MemberController.java
@@ -0,0 +1,53 @@
+package Spring_Study.mutsa_study.controller;
+
+import Spring_Study.mutsa_study.domain.Member;
+import Spring_Study.mutsa_study.dto.MemberRequestDTO;
+import Spring_Study.mutsa_study.service.MemberService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+import java.util.Optional;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/members")
+public class MemberController {
+
+    private final MemberService memberService;
+
+    @PostMapping
+    public ResponseEntity<?> createMember(@RequestBody MemberRequestDTO requestDTO) {
+        Member member = memberService.createMember(requestDTO);
+        return ResponseEntity.status(201).body(member);
+    }
+
+    @GetMapping
+    public ResponseEntity<?> getMemberList() {
+        try {
+            List<Member> members = memberService.findAllMembers();
+            if (members.isEmpty()) {
+                return ResponseEntity.status(200).body("사용자가 존재하지 않습니다.");
+            }
+            return ResponseEntity.status(200).body(members);
+        }catch (Exception e) {
+            return ResponseEntity.status(500).body("서버 내부 에러");
+        }
+
+    }
+
+    @GetMapping("/{memberId}")
+    public ResponseEntity<?>getOneMember(@PathVariable("memberId") Long memberId) {
+        try{
+            Optional<Member> response = memberService.findMemberById(memberId);
+            if (response.isPresent()) {
+                return ResponseEntity.ok(response.get());
+            } else {
+                return ResponseEntity.status(404).body("해당 사용자를 찾을 수 없습니다.");
+            }
+        }catch(Exception e){
+            return ResponseEntity.status(500).body("서버 내부 에러");
+        }
+    }
+}
diff --git a/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/domain/Member.java b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/domain/Member.java
new file mode 100644
index 0000000..ba2d46a
--- /dev/null
+++ b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/domain/Member.java
@@ -0,0 +1,28 @@
+package Spring_Study.mutsa_study.domain;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor
+public class Member {
+    @Id
+    @GeneratedValue
+    @Column(name = "member_id")
+    private Long id;
+
+    private String name;
+    private String email;
+
+    @Builder
+    public Member(String name, String email) {
+        this.name = name;
+        this.email = email;
+    }
+}
diff --git a/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/dto/MemberRequestDTO.java b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/dto/MemberRequestDTO.java
new file mode 100644
index 0000000..0752b1b
--- /dev/null
+++ b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/dto/MemberRequestDTO.java
@@ -0,0 +1,21 @@
+package Spring_Study.mutsa_study.dto;
+
+import Spring_Study.mutsa_study.domain.Member;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class MemberRequestDTO {
+    private String name;
+    private String email;
+
+    public Member toEntity() {
+        return Member.builder()
+                .email(email)
+                .name(name)
+                .build();
+    }
+}
diff --git a/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/repository/MemberRepository.java b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/repository/MemberRepository.java
new file mode 100644
index 0000000..15063b9
--- /dev/null
+++ b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/repository/MemberRepository.java
@@ -0,0 +1,7 @@
+package Spring_Study.mutsa_study.repository;
+
+import Spring_Study.mutsa_study.domain.Member;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface MemberRepository extends JpaRepository<Member, Long> {
+}
diff --git a/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/service/MemberService.java b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/service/MemberService.java
new file mode 100644
index 0000000..2a13f36
--- /dev/null
+++ b/week3/seungbeom/src/main/java/Spring_Study/mutsa_study/service/MemberService.java
@@ -0,0 +1,32 @@
+package Spring_Study.mutsa_study.service;
+
+import Spring_Study.mutsa_study.domain.Member;
+import Spring_Study.mutsa_study.dto.MemberRequestDTO;
+import Spring_Study.mutsa_study.repository.MemberRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class MemberService {
+    private final MemberRepository memberRepository;
+
+    @Transactional
+    public Member createMember(MemberRequestDTO requestDTO) {
+        Member member = memberRepository.save(requestDTO.toEntity());
+        return member;
+    }
+
+    public List<Member> findAllMembers() {
+        return memberRepository.findAll();
+    }
+
+    public Optional<Member> findMemberById(Long id) {
+        return memberRepository.findById(id);
+    }
+}
diff --git a/week3/seungbeom/src/main/resources/application.yml b/week3/seungbeom/src/main/resources/application.yml
new file mode 100644
index 0000000..1262a8a
--- /dev/null
+++ b/week3/seungbeom/src/main/resources/application.yml
@@ -0,0 +1,17 @@
+spring:
+  datasource:
+    url: jdbc:h2:tcp://localhost/~/study
+    username: sa
+    driver-class-name: org.h2.Driver
+
+  jpa:
+    hibernate:
+      ddl-auto: create
+    properties:
+      hibernate:
+        format_sql: true
+
+logging:
+  level:
+    org.hibernate.SQL: debug
+    org.hibernate.orm.jdbc.bind: trace
\ No newline at end of file
diff --git a/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/Example.java b/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/Example.java
new file mode 100644
index 0000000..3218b68
--- /dev/null
+++ b/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/Example.java
@@ -0,0 +1,13 @@
+package Spring_Study.mutsa_study;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+public class Example {
+
+    @Test
+    void test() {
+
+    }
+}
diff --git a/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/MutsaStudyApplicationTests.java b/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/MutsaStudyApplicationTests.java
new file mode 100644
index 0000000..ad979f7
--- /dev/null
+++ b/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/MutsaStudyApplicationTests.java
@@ -0,0 +1,13 @@
+package Spring_Study.mutsa_study;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class MutsaStudyApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}
diff --git a/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/controller/MemberControllerTest.java b/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/controller/MemberControllerTest.java
new file mode 100644
index 0000000..877e463
--- /dev/null
+++ b/week3/seungbeom/src/test/java/Spring_Study/mutsa_study/controller/MemberControllerTest.java
@@ -0,0 +1,105 @@
+package Spring_Study.mutsa_study.controller;
+
+import Spring_Study.mutsa_study.domain.Member;
+import Spring_Study.mutsa_study.dto.MemberRequestDTO;
+import Spring_Study.mutsa_study.repository.MemberRepository;
+import Spring_Study.mutsa_study.service.MemberService;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.ResultActions;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.*;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+@SpringBootTest
+@AutoConfigureMockMvc
+public class MemberControllerTest {
+    @Autowired
+    protected MockMvc mvc;
+
+    @Autowired
+    protected ObjectMapper objectMapper;
+
+    @Autowired
+    protected WebApplicationContext webApplicationContext;
+
+    @Autowired
+    MemberRepository memberRepository;
+    @Autowired
+    private MemberService memberService;
+
+    @BeforeEach
+    public void mockMvcSetup() {
+        this.mvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
+                .build();
+        memberRepository.deleteAll();
+    }
+
+    @Test
+    public void addMember() throws Exception {
+        final String url = "/members";
+        final String name = "박승범";
+        final String email = "psb3707@naver.com";
+        final MemberRequestDTO requestDTO = new MemberRequestDTO(name, email);
+
+        final String requestBody = objectMapper.writeValueAsString(requestDTO);
+        ResultActions resultActions = mvc.perform(post(url)
+                .contentType(MediaType.APPLICATION_JSON_VALUE)
+                .content(requestBody));
+
+        resultActions.andExpect(status().isCreated());
+        List<Member> members = memberRepository.findAll();
+        assertThat(members.size()).isEqualTo(1);
+        assertThat(members.get(0).getName()).isEqualTo(name);
+        assertThat(members.get(0).getEmail()).isEqualTo(email);
+    }
+
+    @DisplayName("getMembers() : 멤버 전체 조회에 성공한다.")
+    @Test
+    public void getMembers() throws Exception {
+        final String url = "/members";
+
+        memberService.createMember(new MemberRequestDTO("박승범", "psb3707@naver.com"));
+        memberService.createMember(new MemberRequestDTO("박준범", "pjb3707@naver.com"));
+
+        ResultActions resultActions = mvc.perform(get(url)
+                .accept(MediaType.APPLICATION_JSON_VALUE));
+
+        resultActions.andExpect(status().isOk())
+                .andExpect(jsonPath("$[0].name").value("박승범"))
+                .andExpect(jsonPath("$[0].email").value("psb3707@naver.com"))
+                .andExpect(jsonPath("$[1].name").value("박준범"))
+                .andExpect(jsonPath("$[1].email").value("pjb3707@naver.com"));
+    }
+
+    @DisplayName("getMember() : 멤버 단건 조회에 성공한다.")
+    @Test
+    public void getMember() throws Exception {
+        final String url = "/members/{id}";
+
+        Member member = memberService.createMember(new MemberRequestDTO("박승범", "psb3707@naver.com"));
+
+        ResultActions result = mvc.perform(get(url, member.getId())
+                .accept(MediaType.APPLICATION_JSON_VALUE));
+
+        result.andExpect(status().isOk())
+                .andExpect(jsonPath("$.email").value("psb3707@naver.com"))
+                .andExpect(jsonPath("$.name").value("박승범"));
+    }
+}
\ No newline at end of file