diff --git a/src/main/java/com/back/web7_9_codecrete_be/domain/users/entity/User.java b/src/main/java/com/back/web7_9_codecrete_be/domain/users/entity/User.java
index 8e08a5e2..91ac3a93 100644
--- a/src/main/java/com/back/web7_9_codecrete_be/domain/users/entity/User.java
+++ b/src/main/java/com/back/web7_9_codecrete_be/domain/users/entity/User.java
@@ -96,5 +96,9 @@ public void softDelete() {
         this.status = UserStatus.DELETED;
         this.deletedDate = LocalDateTime.now();
     }
+
+    public void promoteToAdmin() {
+        this.role = Role.ADMIN;
+    }
 }
 
diff --git a/src/main/java/com/back/web7_9_codecrete_be/global/initData/BaseInitData.java b/src/main/java/com/back/web7_9_codecrete_be/global/initData/BaseInitData.java
new file mode 100644
index 00000000..e50cc942
--- /dev/null
+++ b/src/main/java/com/back/web7_9_codecrete_be/global/initData/BaseInitData.java
@@ -0,0 +1,61 @@
+package com.back.web7_9_codecrete_be.global.initData;
+
+import com.back.web7_9_codecrete_be.domain.users.entity.User;
+import com.back.web7_9_codecrete_be.domain.users.repository.UserRepository;
+import jakarta.annotation.PostConstruct;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Profile;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Component;
+
+import java.time.LocalDate;
+
+@Profile("dev")
+@Component
+@RequiredArgsConstructor
+public class BaseInitData {
+
+    private final UserRepository userRepository;
+    private final PasswordEncoder passwordEncoder;
+
+    @PostConstruct
+    public void init() {
+        createTestUser();
+        createAdminUser();
+    }
+
+    private void createTestUser() {
+        if (userRepository.existsByEmail("test@test.com")) {
+            return;
+        }
+
+        User testUser = User.builder()
+                .email("test@test.com")
+                .nickname("테스트유저")
+                .password(passwordEncoder.encode("test1234!"))
+                .birth(LocalDate.of(1999, 1, 1))
+                .profileImage("https://example.com/profile.jpg")
+                .build();
+
+        userRepository.save(testUser);
+    }
+
+    private void createAdminUser() {
+        if (userRepository.existsByEmail("admin@test.com")) {
+            return;
+        }
+
+        User adminUser = User.builder()
+                .email("admin@test.com")
+                .nickname("어드민")
+                .password(passwordEncoder.encode("admin1234!"))
+                .birth(LocalDate.of(1990, 1, 1))
+                .profileImage("https://example.com/profile.jpg")
+                .build();
+
+        // dev 전용 어드민 권한 부여
+        adminUser.promoteToAdmin();
+
+        userRepository.save(adminUser);
+    }
+}