diff --git a/ReadMe.md b/ReadMe.md
index 812cb72..fa1c7e4 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -1,2 +1,19 @@
 # UrlShortener
-원본 URL을 짧게 요약시키는 시스템
+원본 URL을 짧게 단축시키는 시스템
+### Use Skill tree
+| | Skills |
+|---|---|
+| <b>Back-End</b> | Spring Framework(MVC, JPA) |
+| <b>Front-End</b> | Thyme-leaf |
+| <b>Infra</b> | Linux, MariaDB |
+### 주요 기능
+1. 긴 원본 URL을 짧은 형태나 사용자가 희망하는 단어의 형태로 URL 단축
+2.  단축된 URL로 접속 시도 시, (존재하는 URL의 경우) 원본 URL로 Redirect 처리
+3. 정상적인 HTTP(HTTPS) URL인지 검증한 후 단축 진행
+4. 단축 URL을 특정 기간에만 유지되도록 하고, 특정 기간을 경과하면 접속 차단<br>
+### 구현 현황
+- [x] 개발 환경 구축
+- [x] DB 설계 및 Entity 구현
+- [x] URL 단축 알고리즘 구현
+- [ ] URL 단축 저장 및 조회 기능 구현
+- [ ] 테스트 및 배포
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index f9cc560..aa3e52c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -38,10 +38,10 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-data-rest</artifactId>
 		</dependency>
-		<dependency>
+		<!-- <dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-security</artifactId>
-		</dependency>
+		</dependency> -->
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-thymeleaf</artifactId>
@@ -50,10 +50,10 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
-		<dependency>
+		<!-- <dependency>
 			<groupId>org.thymeleaf.extras</groupId>
 			<artifactId>thymeleaf-extras-springsecurity6</artifactId>
-		</dependency>
+		</dependency> -->
 
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
@@ -61,12 +61,12 @@
 			<scope>runtime</scope>
 			<optional>true</optional>
 		</dependency>
-		<dependency>
+		<!-- <dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-docker-compose</artifactId>
 			<scope>runtime</scope>
 			<optional>true</optional>
-		</dependency>
+		</dependency> -->
 		<dependency>
 			<groupId>org.mariadb.jdbc</groupId>
 			<artifactId>mariadb-java-client</artifactId>
@@ -80,17 +80,24 @@
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
-			<scope>test</scope>
 		</dependency>
+			<scope>test</scope>
 		<dependency>
 			<groupId>org.springframework.restdocs</groupId>
 			<artifactId>spring-restdocs-mockmvc</artifactId>
 			<scope>test</scope>
 		</dependency>
-		<dependency>
+		<!-- <dependency>
 			<groupId>org.springframework.security</groupId>
 			<artifactId>spring-security-test</artifactId>
 			<scope>test</scope>
+		</dependency> -->
+
+		<!-- Base62 Library -->
+		<dependency>
+			<groupId>io.seruco.encoding</groupId>
+			<artifactId>base62</artifactId>
+			<version>0.1.3</version>
 		</dependency>
 	</dependencies>
 
diff --git a/sql/DDL.sql b/sql/DDL.sql
new file mode 100644
index 0000000..732b0ef
--- /dev/null
+++ b/sql/DDL.sql
@@ -0,0 +1,29 @@
+CREATE DATABASE `hangyub_url_shortener`;
+
+USE hangyub_url_shortener;
+
+DROP TABLE IF EXISTS url_map;
+DROP TABLE IF EXISTS users;
+
+CREATE TABLE `users`(
+    `user_id` INT NOT NULL AUTO_INCREMENT,
+    `user_email` VARCHAR(100) NOT NULL,
+    `user_password` VARCHAR(30) NOT NULL,
+    `user_nickname` VARCHAR(20) NOT NULL,
+    `user_created_at` DATETIME NOT NULL,
+    PRIMARY KEY(user_id)
+);
+
+CREATE TABLE `url_map`(
+    `url_map_id` INT NOT NULL AUTO_INCREMENT,
+    `url_map_original` VARCHAR(255) NOT NULL,
+    `url_map_short` VARCHAR(7) NOT NULL,
+    `url_map_is_active` TINYINT(1) NOT NULL,
+    `user_id` INT NULL,
+    `url_map_click` INT NOT NULL DEFAULT 0,
+    `url_map_created_at` DATETIME NOT NULL,
+    `url_map_edited_at` DATETIME NOT NULL,
+    `url_map_expired_at` DATETIME NULL,
+    PRIMARY KEY(url_map_id),
+    FOREIGN KEY(user_id) REFERENCES users(user_id)
+);
diff --git a/src/main/java/be/gyu/urlShortener/entity/UrlMap.java b/src/main/java/be/gyu/urlShortener/entity/UrlMap.java
new file mode 100644
index 0000000..0fcb4cc
--- /dev/null
+++ b/src/main/java/be/gyu/urlShortener/entity/UrlMap.java
@@ -0,0 +1,29 @@
+package be.gyu.urlShortener.entity;
+
+import java.time.LocalDateTime;
+
+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 lombok.Getter;
+
+@Entity
+@Getter
+public class UrlMap {
+    @Id
+    @GeneratedValue(strategy=GenerationType.IDENTITY)
+    private int urlMapId;
+    private String urlMapOriginal;
+    private String urlMapShort;
+    private boolean urlMapIsActive;
+    @ManyToOne
+    @JoinColumn(name="user_id")
+    private Users user;
+    private int urlMapClick;
+    private LocalDateTime urlMapCreatedAt;
+    private LocalDateTime urlMapEditedAt;
+    private LocalDateTime urlMapExpiredAt;
+}
diff --git a/src/main/java/be/gyu/urlShortener/entity/Users.java b/src/main/java/be/gyu/urlShortener/entity/Users.java
new file mode 100644
index 0000000..d257e60
--- /dev/null
+++ b/src/main/java/be/gyu/urlShortener/entity/Users.java
@@ -0,0 +1,21 @@
+package be.gyu.urlShortener.entity;
+
+import java.time.LocalDateTime;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import lombok.Getter;
+
+@Entity
+@Getter
+public class Users {
+    @Id
+    @GeneratedValue(strategy=GenerationType.IDENTITY)
+    private int userId;
+    private String userEmail;
+    private String userPassword;
+    private String userNickname;
+    private LocalDateTime userCreatedAt;
+}