diff --git a/build.gradle b/build.gradle
index 931edeb..858b8b5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,6 +27,8 @@ dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
 	implementation 'org.springframework.boot:spring-boot-starter-security'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+	// S3
+	implementation 'org.springframework.cloud:spring-cloud-starter-aws:2.2.6.RELEASE'
 	compileOnly 'org.projectlombok:lombok'
 	runtimeOnly 'com.mysql:mysql-connector-j'
 	annotationProcessor 'org.projectlombok:lombok'
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardCommandRes.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardCommandRes.java
new file mode 100644
index 0000000..509fe1c
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardCommandRes.java
@@ -0,0 +1,13 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.board.dto;
+
+import kr.hs.dgsw.SOPO_server_v2.domain.board.entity.BoardEntity;
+
+public record BoardCommandRes (
+    Long boardId
+) {
+    public static BoardCommandRes of (BoardEntity board) {
+        return new BoardCommandRes(
+                board.getBoardId()
+        );
+    }
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardLoadRes.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardLoadRes.java
new file mode 100644
index 0000000..aa34495
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardLoadRes.java
@@ -0,0 +1,22 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.board.dto;
+
+import kr.hs.dgsw.SOPO_server_v2.domain.board.entity.BoardEntity;
+
+public record BoardLoadRes (
+        Long boardId,
+        String boardTitle,
+        String boardContent,
+        Integer boardLikeCount
+        // List<String> fileUrls,
+        // Long memberId
+){
+    public static BoardLoadRes of(BoardEntity board) {
+        return new BoardLoadRes(
+                board.getBoardId(),
+                board.getBoardTitle(),
+                board.getBoardTitle(),
+                board.getBoardLikeCount()
+                //board.getFile() Url을 String 으로 묶어서 받아야 함.
+        );
+    }
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardUpdateReq.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardUpdateReq.java
new file mode 100644
index 0000000..4af3686
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/dto/BoardUpdateReq.java
@@ -0,0 +1,7 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.board.dto;
+
+public record BoardUpdateReq(
+        String boardTitle,
+        String boardContent
+) {
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/entity/BoardEntity.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/entity/BoardEntity.java
new file mode 100644
index 0000000..b9bf40c
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/board/entity/BoardEntity.java
@@ -0,0 +1,61 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.board.entity;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
+import kr.hs.dgsw.SOPO_server_v2.domain.board.dto.BoardUpdateReq;
+import kr.hs.dgsw.SOPO_server_v2.domain.file.entity.FileEntity;
+import kr.hs.dgsw.SOPO_server_v2.domain.member.entity.MemberEntity;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.experimental.SuperBuilder;
+
+import java.util.List;
+
+@Getter
+@Entity
+@Table(name = "tbl_board")
+@NoArgsConstructor
+@SuperBuilder
+public class BoardEntity {
+
+    // 게시물 아이디
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "board_id")
+    private Long boardId;
+
+    // 게시물 제목
+    @Column(name = "board_title")
+    private String boardTitle;
+
+    // 게시물 내용
+    @Column(name = "board_content")
+    private String boardContent;
+
+    // 게시물 좋아요
+    @Column(name = "board_like_count")
+    private Integer boardLikeCount = 0;
+
+    // 유저 아이디
+    @ManyToOne
+    @JoinColumn(name = "member_id") // member_id로 참조한다.
+    private MemberEntity member;
+
+    // 게시물 파일
+    @OneToMany(mappedBy = "board", cascade = CascadeType.ALL, orphanRemoval = true) // 읽기만, 게시물 삭제될 때 함께 삭제
+    private List<FileEntity> file;
+
+    public void update(BoardUpdateReq updateReq) {
+        this.boardTitle = updateReq.boardTitle();
+        this.boardContent = updateReq.boardContent();
+    }
+
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestCommandRes.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestCommandRes.java
new file mode 100644
index 0000000..1b535f2
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestCommandRes.java
@@ -0,0 +1,14 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.contest.dto;
+
+import kr.hs.dgsw.SOPO_server_v2.domain.contest.entity.ContestEntity;
+
+
+public record ContestCommandRes(
+        Long contestId
+) {
+    public static ContestCommandRes of (ContestEntity contest) {
+        return new ContestCommandRes(
+                contest.getContestId()
+        );
+    }
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestLoadRes.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestLoadRes.java
new file mode 100644
index 0000000..d02e589
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestLoadRes.java
@@ -0,0 +1,28 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.contest.dto;
+
+import kr.hs.dgsw.SOPO_server_v2.domain.contest.entity.ContestEntity;
+
+import java.time.LocalDateTime;
+
+public record ContestLoadRes (
+        Long contestId,
+        String contestTitle,
+        String contestContent,
+        Integer contestMax,
+        Integer contestPerson,
+        LocalDateTime contestDateTime
+        // List<String> fileUrls,
+        // Long memberId
+) {
+    public static ContestLoadRes of(ContestEntity contest) {
+        return new ContestLoadRes (
+                contest.getContestId(),
+                contest.getContestTitle(),
+                contest.getContestContent(),
+                contest.getContestMax(),
+                contest.getContestPerson(),
+                contest.getContestDateTime()
+                //contest.getFile() Url을 String 으로 묶어서 받아야 함.
+        );
+    }
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestUpdateReq.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestUpdateReq.java
new file mode 100644
index 0000000..d4dc108
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/dto/ContestUpdateReq.java
@@ -0,0 +1,14 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.contest.dto;
+
+import kr.hs.dgsw.SOPO_server_v2.domain.contest.enums.ContestState;
+
+import java.time.LocalDateTime;
+
+public record ContestUpdateReq (
+        String contestTitle,
+        String contestContent,
+        Integer contestMax,
+        Integer contestPerson,
+        LocalDateTime contestDateTime
+) {
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/entity/ContestEntity.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/entity/ContestEntity.java
new file mode 100644
index 0000000..5dff9c1
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/entity/ContestEntity.java
@@ -0,0 +1,83 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.contest.entity;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
+import kr.hs.dgsw.SOPO_server_v2.domain.contest.dto.ContestUpdateReq;
+import kr.hs.dgsw.SOPO_server_v2.domain.contest.enums.ContestState;
+import kr.hs.dgsw.SOPO_server_v2.domain.file.entity.FileEntity;
+import kr.hs.dgsw.SOPO_server_v2.domain.member.entity.MemberEntity;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.experimental.SuperBuilder;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.util.Date;
+import java.util.List;
+
+@Getter
+@Entity
+@Table(name = "tbl_contest")
+@NoArgsConstructor
+@SuperBuilder
+public class ContestEntity {
+
+    // 대회 아이디
+    @Id
+    @Column(name = "contest_id")
+    private Long contestId;
+
+    // 대회 제목
+    @Column(name = "contest_title")
+    private String contestTitle;
+
+    // 대회 내용
+    @Column(name = "contest_content")
+    private String contestContent;
+
+    // 대회 상태
+    @Column(name = "contest_state")
+    @Enumerated(EnumType.STRING)
+    private ContestState contestState = ContestState.ACTIVE;
+
+    // 대회 정원
+    @Column(name = "contest_max")
+    private Integer contestMax;
+
+    // 대회 인원
+    @Column(name = "contest_person")
+    private Integer contestPerson;
+
+    // 대회 마감일
+    @Column(name = "contest_date_time")
+    private LocalDateTime contestDateTime;
+
+    // 대회 좋아요
+    @Column(name = "contest_like_count")
+    private Integer contestLikeCount = 0;
+
+    // 유저 아이디
+    @ManyToOne
+    @JoinColumn(name = "member_id")
+    private MemberEntity member;
+
+    // 대회 파일
+    @OneToMany(mappedBy = "contest", cascade = CascadeType.ALL, orphanRemoval = true) // 읽기만, 게시물 삭제될 때 함께 삭제
+    private List<FileEntity> file;
+
+    public void update(ContestUpdateReq updateReq) {
+        this.contestTitle = updateReq.contestTitle();
+        this.contestContent = updateReq.contestContent();
+        this.contestMax = updateReq.contestMax();
+        this.contestPerson = updateReq.contestPerson();
+        this.contestDateTime = updateReq.contestDateTime();
+    }
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/enums/ContestState.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/enums/ContestState.java
new file mode 100644
index 0000000..cee28d5
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/contest/enums/ContestState.java
@@ -0,0 +1,5 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.contest.enums;
+
+public enum ContestState {
+    ACTIVE, DISABLED
+}
diff --git a/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/entity/FileEntity.java b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/entity/FileEntity.java
new file mode 100644
index 0000000..65597fd
--- /dev/null
+++ b/src/main/java/kr/hs/dgsw/SOPO_server_v2/domain/file/entity/FileEntity.java
@@ -0,0 +1,49 @@
+package kr.hs.dgsw.SOPO_server_v2.domain.file.entity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import kr.hs.dgsw.SOPO_server_v2.domain.board.entity.BoardEntity;
+import kr.hs.dgsw.SOPO_server_v2.domain.contest.entity.ContestEntity;
+import kr.hs.dgsw.SOPO_server_v2.domain.member.entity.MemberEntity;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Getter
+@Entity
+@Table(name = "tbl_file")
+@NoArgsConstructor
+public class FileEntity {
+
+    // 파일 아이디
+    @Id
+    @Column(name = "file_id")
+    private Long fileId;
+
+    // 파일 이름
+    @Column(name = "file_name")
+    private String fileName;
+
+    // 파일 url
+    @Column(name = "file_url")
+    private String fileUrl;
+
+    // 게시물 아이디
+    @ManyToOne
+    @JoinColumn(name = "board_id")
+    private BoardEntity board;
+
+    // 대회 아이디
+    @ManyToOne
+    @JoinColumn(name = "contest_id")
+    private ContestEntity contest;
+
+    // 유저 아이디
+    @ManyToOne
+    @JoinColumn(name = "member_id")
+    private MemberEntity member;
+
+}