diff --git a/.gitignore b/.gitignore
index e4a226798..594f1c5e0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,6 +54,7 @@ dump.rdb
 **/resources/application-local.yml
 **/resources/application-test.yml
 **/resources/application-qa.yml
+**/resources/application-seed.yml
 **/resources/dongnae_firebase_key.json
 
 Dockerfile
diff --git a/app-main/src/main/java/net/causw/app/main/domain/user/account/repository/user/UserRepository.java b/app-main/src/main/java/net/causw/app/main/domain/user/account/repository/user/UserRepository.java
index 491025687..946740172 100644
--- a/app-main/src/main/java/net/causw/app/main/domain/user/account/repository/user/UserRepository.java
+++ b/app-main/src/main/java/net/causw/app/main/domain/user/account/repository/user/UserRepository.java
@@ -84,4 +84,6 @@ Optional<User> findByPhoneNumber(
 	Boolean existsByStudentId(String studentId);
 
 	Optional<User> findByEmailAndName(String email, String name);
+
+	boolean existsBy();
 }
\ No newline at end of file
diff --git a/app-main/src/main/java/net/causw/app/main/shared/seed/UserSeedRunner.java b/app-main/src/main/java/net/causw/app/main/shared/seed/UserSeedRunner.java
new file mode 100644
index 000000000..5dd60bf10
--- /dev/null
+++ b/app-main/src/main/java/net/causw/app/main/shared/seed/UserSeedRunner.java
@@ -0,0 +1,22 @@
+package net.causw.app.main.shared.seed;
+
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.context.annotation.Profile;
+import org.springframework.stereotype.Component;
+
+@Component
+@Profile("seed")
+public class UserSeedRunner implements CommandLineRunner {
+
+	private final UserSeeder userSeeder;
+
+	public UserSeedRunner(UserSeeder userSeeder) {
+		this.userSeeder = userSeeder;
+	}
+
+	@Override
+	public void run(String... args) {
+		int count = args.length > 0 ? Integer.parseInt(args[0]) : 10_000;
+		userSeeder.seed(count);
+	}
+}
diff --git a/app-main/src/main/java/net/causw/app/main/shared/seed/UserSeeder.java b/app-main/src/main/java/net/causw/app/main/shared/seed/UserSeeder.java
new file mode 100644
index 000000000..d69db140a
--- /dev/null
+++ b/app-main/src/main/java/net/causw/app/main/shared/seed/UserSeeder.java
@@ -0,0 +1,154 @@
+package net.causw.app.main.shared.seed;
+
+import java.util.List;
+import java.util.Set;
+import java.util.UUID;
+
+import org.springframework.context.annotation.Profile;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import net.causw.app.main.api.dto.user.UserCreateRequestDto;
+import net.causw.app.main.domain.asset.file.entity.UuidFile;
+import net.causw.app.main.domain.asset.file.entity.joinEntity.UserAcademicRecordApplicationAttachImage;
+import net.causw.app.main.domain.asset.file.entity.joinEntity.UserProfileImage;
+import net.causw.app.main.domain.asset.file.enums.FilePath;
+import net.causw.app.main.domain.user.academic.entity.userAcademicRecord.UserAcademicRecordApplication;
+import net.causw.app.main.domain.user.academic.enums.userAcademicRecord.AcademicRecordRequestStatus;
+import net.causw.app.main.domain.user.academic.enums.userAcademicRecord.AcademicStatus;
+import net.causw.app.main.domain.user.account.entity.user.User;
+import net.causw.app.main.domain.user.account.entity.user.UserAdmissionLog;
+import net.causw.app.main.domain.user.account.enums.user.Department;
+import net.causw.app.main.domain.user.account.enums.user.Role;
+import net.causw.app.main.domain.user.account.enums.user.UserAdmissionLogAction;
+import net.causw.app.main.domain.user.account.enums.user.UserState;
+import net.causw.app.main.domain.user.account.repository.user.UserRepository;
+
+import jakarta.persistence.EntityManager;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+
+@Component
+@Profile("seed")
+@RequiredArgsConstructor
+@Slf4j
+public class UserSeeder {
+
+	private final EntityManager em;
+	private final PasswordEncoder passwordEncoder;
+	private final UserRepository userRepository;
+
+	@Transactional
+	public void seed(int count) {
+
+		boolean exist = userRepository.existsBy();
+
+		if (exist) {
+			log.warn("🚫 Seed skipped: users already exist");
+			return;
+		}
+		// getOrCreateAdmin();
+		process(count);
+	}
+
+	private void process(int count) {
+		int batchSize = 500;
+
+		String encodedPassword = passwordEncoder.encode("password00!!");
+		for (int i = 1; i <= count; i++) {
+
+			User user = createActiveCommonUser(i, encodedPassword);
+
+			UserAdmissionLog log = createUserAdmissionLog(user);
+			createEnrolledAcademicRecord(user, 2026);
+
+			// batch flush
+			if (i % batchSize == 0) {
+				em.flush();
+				em.clear();
+				System.out.println("Seeded users: " + i);
+			}
+		}
+
+		em.flush();
+		em.clear();
+	}
+
+	private UserAdmissionLog createUserAdmissionLog(User user) {
+		UserAdmissionLog log = UserAdmissionLog.of(
+			user.getEmail(),
+			user.getName(),
+			"admin@seed.test",
+			"시드 관리자",
+			UserAdmissionLogAction.ACCEPT,
+			List.of(),
+			"시드 데이터 - 가입 승인 완료",
+			null);
+		em.persist(log);
+
+		return log;
+	}
+
+	private User createActiveCommonUser(int i, String encodedPassword) {
+		UserCreateRequestDto dto = UserCreateRequestDto.builder()
+			.email("seed" + i + "@cau.ac.kr")
+			.name("시드유저" + i)
+			.password("password00!!") // 정규식 통과
+			.studentId("2020" + String.format("%04d", i))
+			.admissionYear(2020)
+			.nickname("seed_" + i)
+			.major("소프트웨어학부")
+			.department(Department.SCHOOL_OF_SW)
+			.phoneNumber(String.format("010-%04d-%04d", 2000 + i / 10000, i % 10000))
+			.build();
+
+		User user = User.from(dto, encodedPassword);
+		user.setRoles(Set.of(Role.COMMON));
+		user.setState(UserState.ACTIVE);
+		em.persist(user);
+
+		// UUID File (가짜 파일)
+		UuidFile file = UuidFile.of(UUID.randomUUID().toString(), "seed/profile/" + i + ".png",
+			"https://cdn.seed.test/profile/" + i + ".png", "profile_" + i + ".png", "png", FilePath.ETC);
+		em.persist(file);
+		// User File 관계 테이블
+		UserProfileImage profile = UserProfileImage.of(user, file);
+		em.persist(profile);
+
+		return user;
+	}
+
+	private void createEnrolledAcademicRecord(
+		User user,
+		int completedSemester) {
+		// 1. User 상태 확정
+		user.setAcademicStatus(AcademicStatus.ENROLLED);
+		user.setCurrentCompletedSemester(completedSemester);
+		user.setState(UserState.ACTIVE);
+
+		// 2. 학적 증빙 신청서 (이미 ACCEPT 된 상태)
+		UserAcademicRecordApplication application = UserAcademicRecordApplication.create(
+			user,
+			AcademicRecordRequestStatus.ACCEPT,
+			AcademicStatus.ENROLLED,
+			completedSemester,
+			"시드 데이터 - 재학 인증 완료");
+
+		em.persist(application);
+
+		// 3. 첨부 이미지 1개
+		UuidFile recordFile = UuidFile.of(
+			UUID.randomUUID().toString(),
+			"seed/academic-record/" + user.getId() + ".png",
+			"https://cdn.seed.test/academic-record/" + user.getId() + ".png",
+			"academic_record.png",
+			"png",
+			FilePath.ETC);
+		em.persist(recordFile);
+
+		UserAcademicRecordApplicationAttachImage attach = UserAcademicRecordApplicationAttachImage.of(application,
+			recordFile);
+		em.persist(attach);
+	}
+}
\ No newline at end of file