diff --git a/bitgouel-api/src/main/kotlin/team/msg/common/util/StudentUtil.kt b/bitgouel-api/src/main/kotlin/team/msg/common/util/StudentUtil.kt
index 2243409ab..83f03f9cd 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/common/util/StudentUtil.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/common/util/StudentUtil.kt
@@ -1,6 +1,7 @@
 package team.msg.common.util
 
 import org.springframework.stereotype.Component
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.domain.club.model.Club
 import team.msg.domain.student.enums.StudentRole
 import team.msg.domain.student.model.Student
@@ -16,6 +17,7 @@ class StudentUtil(
     fun createStudent(user: User, club: Club, grade: Int, classRoom: Int, number: Int, admissionNumber: Int, subscriptionGrade: Int) {
         val student = Student(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = user,
             club = club,
             grade = grade,
diff --git a/bitgouel-api/src/main/kotlin/team/msg/common/util/UserUtil.kt b/bitgouel-api/src/main/kotlin/team/msg/common/util/UserUtil.kt
index f1edaf288..0b644ae7a 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/common/util/UserUtil.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/common/util/UserUtil.kt
@@ -5,6 +5,7 @@ import org.springframework.security.core.context.SecurityContextHolder
 import org.springframework.stereotype.Component
 import team.msg.common.entity.BaseUUIDEntity
 import team.msg.common.enums.ApproveStatus
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.domain.admin.exception.AdminNotFoundException
 import team.msg.domain.admin.model.Admin
 import team.msg.domain.admin.repository.AdminRepository
@@ -213,6 +214,7 @@ class UserUtil(
         return userRepository.save(
             User(
                 id = UUID(0, 0),
+                ulid = ULIDGenerator.generateULID(),
                 email = email,
                 name = name,
                 phoneNumber = phoneNumber,
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/admin/service/AdminServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/admin/service/AdminServiceImpl.kt
index 9e844eaf2..d5a85f6f4 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/admin/service/AdminServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/admin/service/AdminServiceImpl.kt
@@ -42,6 +42,7 @@ import java.time.LocalTime
 import java.time.format.DateTimeFormatter
 import java.util.*
 import javax.servlet.http.HttpServletResponse
+import team.msg.common.ulid.ULIDGenerator
 
 @Service
 class AdminServiceImpl(
@@ -90,6 +91,7 @@ class AdminServiceImpl(
 
             User(
                 id = it.id,
+                ulid = it.ulid,
                 email = it.email,
                 name = it.name,
                 phoneNumber = it.phoneNumber,
@@ -291,6 +293,7 @@ class AdminServiceImpl(
 
             val lecture = Lecture(
                 id = UUID(0, 0),
+                ulid = ULIDGenerator.generateULID(),
                 name = name,
                 content = content,
                 instructor = instructorName,
@@ -314,6 +317,7 @@ class AdminServiceImpl(
                     val timeZone = it.split(" ", "~")
                     LectureDate(
                         id = UUID(0, 0),
+                        ulid = ULIDGenerator.generateULID(),
                         lecture = lecture,
                         completeDate = timeZone[0].toLocalDate(),
                         startTime = timeZone[1].toLocalTime(),
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/auth/service/AuthServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/auth/service/AuthServiceImpl.kt
index a0916889c..d59171a89 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/auth/service/AuthServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/auth/service/AuthServiceImpl.kt
@@ -5,6 +5,7 @@ import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
 import team.msg.common.enums.ApproveStatus
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.common.util.SecurityUtil
 import team.msg.common.util.StudentUtil
 import team.msg.common.util.UserUtil
@@ -106,6 +107,7 @@ class AuthServiceImpl(
 
         val teacher = Teacher(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = user,
             club = club
         )
@@ -130,6 +132,7 @@ class AuthServiceImpl(
 
         val bbozzak = Bbozzak(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = user,
             club = club
         )
@@ -158,6 +161,7 @@ class AuthServiceImpl(
 
         val professor = Professor(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = user,
             club = club,
             university = university
@@ -186,6 +190,7 @@ class AuthServiceImpl(
 
         val governmentInstructor = GovernmentInstructor(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = user,
             club = club,
             government = government,
@@ -216,6 +221,7 @@ class AuthServiceImpl(
 
         val companyInstructor = CompanyInstructor(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = user,
             club = club,
             company = company
@@ -304,6 +310,7 @@ class AuthServiceImpl(
 
         val modifiedPasswordUser = User(
             id = user.id,
+            ulid = user.ulid,
             email = user.email,
             name = user.name,
             phoneNumber = user.phoneNumber,
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/certification/service/CertificationServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/certification/service/CertificationServiceImpl.kt
index 45962c8bf..279245ca4 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/certification/service/CertificationServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/certification/service/CertificationServiceImpl.kt
@@ -3,6 +3,7 @@ package team.msg.domain.certification.service
 import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.common.util.UserUtil
 import team.msg.domain.admin.model.Admin
 import team.msg.domain.bbozzak.exception.BbozzakNotFoundException
@@ -66,6 +67,7 @@ class CertificationServiceImpl(
 
         val certification = Certification(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             studentId = student.id,
             name = request.name,
             acquisitionDate = request.acquisitionDate
@@ -145,6 +147,7 @@ class CertificationServiceImpl(
 
         val updateCertification = Certification(
             id = certification.id,
+            ulid = certification.ulid,
             studentId = certification.studentId,
             name = request.name,
             acquisitionDate = request.acquisitionDate
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/presentation/request/UpdateInquiryRequest.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/presentation/request/UpdateInquiryRequest.kt
index 2ae7d55c0..dbec824ca 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/presentation/request/UpdateInquiryRequest.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/presentation/request/UpdateInquiryRequest.kt
@@ -8,6 +8,7 @@ data class UpdateInquiryRequest(
 ) {
     fun update(inquiry: Inquiry): Inquiry = Inquiry(
         id = inquiry.id,
+        ulid = inquiry.ulid,
         user = inquiry.user,
         question = question,
         questionDetail = questionDetail,
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/service/InquiryServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/service/InquiryServiceImpl.kt
index c54c317a9..426d8ed2d 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/service/InquiryServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/inquiry/service/InquiryServiceImpl.kt
@@ -3,6 +3,7 @@ package team.msg.domain.inquiry.service
 import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.common.util.UserUtil
 import team.msg.domain.inquiry.enums.AnswerStatus
 import team.msg.domain.inquiry.exception.AlreadyAnsweredInquiryException
@@ -40,6 +41,7 @@ class InquiryServiceImpl(
 
         val inquiry = Inquiry(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = currentUser,
             question = request.question,
             questionDetail = request.questionDetail,
@@ -171,6 +173,7 @@ class InquiryServiceImpl(
 
         val inquiryAnswer = InquiryAnswer(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             answer = request.answer,
             admin = currentUser,
             inquiryId = inquiry.id
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/lecture/service/LectureServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/lecture/service/LectureServiceImpl.kt
index b05be2947..137d0c4a1 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/lecture/service/LectureServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/lecture/service/LectureServiceImpl.kt
@@ -41,6 +41,7 @@ import java.time.LocalDateTime
 import java.util.*
 import java.util.concurrent.TimeUnit
 import javax.servlet.http.HttpServletResponse
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.common.util.KakaoUtil
 import team.msg.domain.lecture.enums.CompleteStatus
 import team.msg.domain.lecture.enums.Semester
@@ -76,6 +77,7 @@ class LectureServiceImpl(
 
         val lecture = Lecture(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             user = user,
             name = request.name,
             semester = request.semester,
@@ -97,6 +99,7 @@ class LectureServiceImpl(
         val lectureDates = request.lectureDates.map {
             LectureDate(
                 id = UUID(0, 0),
+                ulid = ULIDGenerator.generateULID(),
                 lecture = savedLecture,
                 completeDate = it.completeDate,
                 startTime = it.startTime,
@@ -137,6 +140,7 @@ class LectureServiceImpl(
 
         val updatedLecture = Lecture(
             id = id,
+            ulid = lecture.ulid,
             user = instructorUser,
             name = request.name,
             semester = semester,
@@ -160,6 +164,7 @@ class LectureServiceImpl(
         val lectureDates = request.lectureDates.map {
             LectureDate(
                 id = UUID(0, 0),
+                ulid = ULIDGenerator.generateULID(),
                 lecture = savedLecture,
                 completeDate = it.completeDate,
                 startTime = it.startTime,
@@ -340,6 +345,7 @@ class LectureServiceImpl(
 
         val registeredLecture = RegisteredLecture(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             student = student,
             lecture = lecture
         )
@@ -348,6 +354,7 @@ class LectureServiceImpl(
 
         val updateCreditStudent = Student(
             id = student.id,
+            ulid = student.ulid,
             user = student.user,
             club = student.club,
             grade = student.grade,
@@ -384,6 +391,7 @@ class LectureServiceImpl(
 
         val updateCreditStudent = Student(
             id = student.id,
+            ulid = student.ulid,
             user = student.user,
             club = student.club,
             grade = student.grade,
@@ -563,6 +571,7 @@ class LectureServiceImpl(
 
             RegisteredLecture(
                 id = registeredLecture.id,
+                ulid = registeredLecture.ulid,
                 student = registeredLecture.student,
                 lecture = registeredLecture.lecture,
                 completeStatus = completeStatus
@@ -614,6 +623,7 @@ class LectureServiceImpl(
 
             RegisteredLecture(
                 id = registeredLecture.id,
+                ulid = registeredLecture.ulid,
                 student = registeredLecture.student,
                 lecture = registeredLecture.lecture,
                 completeStatus = CompleteStatus.NOT_COMPLETED_YET
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/post/service/PostServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/post/service/PostServiceImpl.kt
index 4accda23f..0a27ac10c 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/post/service/PostServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/post/service/PostServiceImpl.kt
@@ -4,6 +4,7 @@ import org.springframework.data.domain.Pageable
 import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.common.util.UserUtil
 import team.msg.domain.post.model.Post
 import team.msg.domain.post.presentation.data.request.CreatePostRequest
@@ -43,6 +44,7 @@ class PostServiceImpl(
         val post = request.run {
             Post(
                 id = UUID(0, 0),
+                ulid = ULIDGenerator.generateULID(),
                 userId = user.id,
                 title = title,
                 content = content,
@@ -78,6 +80,7 @@ class PostServiceImpl(
 
         val updatePost = Post(
             id = post.id,
+            ulid = post.ulid,
             userId = post.userId,
             title = request.title,
             content = request.content,
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/student/service/StudentActivityServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/student/service/StudentActivityServiceImpl.kt
index 63b7c1a43..eee196911 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/student/service/StudentActivityServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/student/service/StudentActivityServiceImpl.kt
@@ -4,6 +4,7 @@ import org.springframework.data.domain.Pageable
 import org.springframework.data.repository.findByIdOrNull
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
+import team.msg.common.ulid.ULIDGenerator
 import team.msg.common.util.UserUtil
 import team.msg.domain.bbozzak.model.Bbozzak
 import team.msg.domain.club.model.Club
@@ -52,6 +53,7 @@ class StudentActivityServiceImpl(
 
         val studentActivity = StudentActivity(
             id = UUID(0, 0),
+            ulid = ULIDGenerator.generateULID(),
             title = request.title,
             content = request.content,
             credit = request.credit,
@@ -81,6 +83,7 @@ class StudentActivityServiceImpl(
 
         val updatedStudentActivity = StudentActivity(
             id = studentActivity.id,
+            ulid = studentActivity.ulid,
             title = request.title,
             content = request.content,
             credit = request.credit,
diff --git a/bitgouel-api/src/main/kotlin/team/msg/domain/user/service/UserServiceImpl.kt b/bitgouel-api/src/main/kotlin/team/msg/domain/user/service/UserServiceImpl.kt
index 018ab033f..dca24c2dd 100644
--- a/bitgouel-api/src/main/kotlin/team/msg/domain/user/service/UserServiceImpl.kt
+++ b/bitgouel-api/src/main/kotlin/team/msg/domain/user/service/UserServiceImpl.kt
@@ -49,6 +49,7 @@ class UserServiceImpl(
 
         val modifiedPasswordUser = User(
             id = user.id,
+            ulid = user.ulid,
             email = user.email,
             name = user.name,
             phoneNumber = user.phoneNumber,
diff --git a/bitgouel-batch/src/main/kotlin/team/msg/jobs/student/GraduateStudentJobConfiguration.kt b/bitgouel-batch/src/main/kotlin/team/msg/jobs/student/GraduateStudentJobConfiguration.kt
index 1173214bc..f5ae96789 100644
--- a/bitgouel-batch/src/main/kotlin/team/msg/jobs/student/GraduateStudentJobConfiguration.kt
+++ b/bitgouel-batch/src/main/kotlin/team/msg/jobs/student/GraduateStudentJobConfiguration.kt
@@ -175,6 +175,7 @@ class GraduateStudentJobConfiguration(
         return student.run {
             Student(
                 id = id,
+                ulid = ulid,
                 user = user,
                 club = club,
                 classRoom = classRoom,
@@ -192,6 +193,7 @@ class GraduateStudentJobConfiguration(
         return student.run {
             Student(
                 id = id,
+                ulid = ulid,
                 user = user,
                 club = club,
                 classRoom = classRoom,
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/common/entity/BaseUUIDEntity.kt b/bitgouel-domain/src/main/kotlin/team/msg/common/entity/BaseUUIDEntity.kt
index af3719fd4..1686e7c05 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/common/entity/BaseUUIDEntity.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/common/entity/BaseUUIDEntity.kt
@@ -14,11 +14,11 @@ abstract class BaseUUIDEntity(
     @Id
     @Column(columnDefinition = "BINARY(16)", nullable = false)
     @get:JvmName(name = "getIdentifier")
-    open var id: UUID = UUID(0, 0)
-) : BaseTimeEntity(), Persistable<UUID> {
-
+    open var id: UUID = UUID(0, 0),
+    
     @Column(name = "ulid", updatable = false, unique = true)
-    var ulid: String? = ULIDGenerator.generateULID()
+    open var ulid: String
+) : BaseTimeEntity(), Persistable<UUID> {
 
     override fun isNew(): Boolean = (id == UUID(0,0)).also { new ->
         if(new) id = UUID.randomUUID()
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/admin/model/Admin.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/admin/model/Admin.kt
index 02c6ea902..f47624e25 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/admin/model/Admin.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/admin/model/Admin.kt
@@ -14,8 +14,10 @@ class Admin(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User?
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/bbozzak/model/Bbozzak.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/bbozzak/model/Bbozzak.kt
index e868cd7c8..5b3588f70 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/bbozzak/model/Bbozzak.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/bbozzak/model/Bbozzak.kt
@@ -15,6 +15,8 @@ class Bbozzak(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User?,
@@ -23,4 +25,4 @@ class Bbozzak(
     @JoinColumn(name = "club_id", nullable = false)
     val club: Club
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/certifiacation/model/Certification.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/certifiacation/model/Certification.kt
index e3f2e6577..e5fecbfab 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/certifiacation/model/Certification.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/certifiacation/model/Certification.kt
@@ -12,6 +12,8 @@ class Certification(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @Column(name = "student_id", columnDefinition = "BINARY(16)")
     val studentId: UUID,
 
@@ -21,4 +23,4 @@ class Certification(
     @Column(columnDefinition = "DATE", nullable = false)
     val acquisitionDate: LocalDate
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/company/model/CompanyInstructor.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/company/model/CompanyInstructor.kt
index cf1c97d57..0d9cc19a3 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/company/model/CompanyInstructor.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/company/model/CompanyInstructor.kt
@@ -16,6 +16,8 @@ class CompanyInstructor(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User?,
@@ -28,4 +30,4 @@ class CompanyInstructor(
     @JoinColumn(name = "company_id")
     val company: Company
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/government/model/GovernmentInstructor.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/government/model/GovernmentInstructor.kt
index d6e516235..9dda5fc7b 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/government/model/GovernmentInstructor.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/government/model/GovernmentInstructor.kt
@@ -17,6 +17,8 @@ class GovernmentInstructor(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User?,
@@ -35,4 +37,4 @@ class GovernmentInstructor(
     @Column(columnDefinition = "VARCHAR(20)", nullable = false)
     val sectors: String
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/Inquiry.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/Inquiry.kt
index 514fb52e8..3604ca3ce 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/Inquiry.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/Inquiry.kt
@@ -16,6 +16,8 @@ class Inquiry(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @ManyToOne
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User,
@@ -29,7 +31,7 @@ class Inquiry(
     @Enumerated(EnumType.STRING)
     @Column(name = "answer_status", nullable = false)
     var answerStatus: AnswerStatus
-) : BaseUUIDEntity(id) {
+) : BaseUUIDEntity(id, ulid) {
     fun replyInquiry() {
         this.answerStatus = AnswerStatus.ANSWERED
     }
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/InquiryAnswer.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/InquiryAnswer.kt
index 6dda2b928..fc3e16523 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/InquiryAnswer.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/inquiry/model/InquiryAnswer.kt
@@ -14,6 +14,8 @@ class InquiryAnswer(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @Column(columnDefinition = "VARCHAR(1000)", nullable = false)
     val answer: String,
 
@@ -24,4 +26,4 @@ class InquiryAnswer(
     @Column(name = "inquiry_id", columnDefinition = "BINARY(16)", nullable = false)
     val inquiryId: UUID
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/Lecture.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/Lecture.kt
index fadbb0c39..c51a650f8 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/Lecture.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/Lecture.kt
@@ -20,6 +20,8 @@ class Lecture(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)", nullable = true)
     val user: User?,
@@ -66,7 +68,7 @@ class Lecture(
 
     @Column(columnDefinition = "TINYINT", nullable = false)
     val isDeleted: Boolean = false
-) : BaseUUIDEntity(id) {
+) : BaseUUIDEntity(id, ulid) {
     fun getLectureStatus(): LectureStatus {
         val currentTime = LocalDateTime.now()
 
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/LectureDate.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/LectureDate.kt
index 6d12c679a..6e8ade7bf 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/LectureDate.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/LectureDate.kt
@@ -15,6 +15,8 @@ class LectureDate (
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "lecture_id", columnDefinition = "BINARY(16)")
     val lecture: Lecture,
@@ -27,4 +29,4 @@ class LectureDate (
 
     @Column(nullable = false, updatable = false, columnDefinition = "TIME")
     val endTime: LocalTime
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/RegisteredLecture.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/RegisteredLecture.kt
index cdaa4f895..1f2076b79 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/RegisteredLecture.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/lecture/model/RegisteredLecture.kt
@@ -18,6 +18,8 @@ class RegisteredLecture(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "student_id", columnDefinition = "BINARY(16)")
     val student: Student,
@@ -29,7 +31,7 @@ class RegisteredLecture(
     @Enumerated(EnumType.STRING)
     @Column(columnDefinition = "VARCHAR(30)", nullable = false)
     val completeStatus: CompleteStatus = CompleteStatus.NOT_COMPLETED_YET
-) : BaseUUIDEntity(id) {
+) : BaseUUIDEntity(id, ulid) {
 
     fun isComplete() = completeStatus != CompleteStatus.NOT_COMPLETED_YET
 }
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/post/model/Post.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/post/model/Post.kt
index 9516e32c7..4f963778d 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/post/model/Post.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/post/model/Post.kt
@@ -12,6 +12,8 @@ class Post (
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @Column(name = "user_id", columnDefinition = "BINARY(16)")
     val userId: UUID,
 
@@ -36,4 +38,4 @@ class Post (
     @Column(columnDefinition = "VARCHAR(10)", nullable = false)
     val feedType: FeedType
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/Student.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/Student.kt
index fbf749519..dd59ca133 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/Student.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/Student.kt
@@ -13,6 +13,8 @@ class Student(
     @get:JvmName(name = "getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User?,
@@ -43,4 +45,4 @@ class Student(
     @Column(name = "student_role", columnDefinition = "VARCHAR(10)", nullable = false)
     val studentRole: StudentRole
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/StudentActivity.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/StudentActivity.kt
index 677cc25e5..213dbdc2e 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/StudentActivity.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/student/model/StudentActivity.kt
@@ -16,6 +16,8 @@ class StudentActivity(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @Column(columnDefinition = "VARCHAR(100)", nullable = false)
     var title: String,
 
@@ -36,4 +38,4 @@ class StudentActivity(
     @JoinColumn(name = "teacher_id", columnDefinition = "BINARY(16)", nullable = false)
     val teacher: Teacher
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/teacher/model/Teacher.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/teacher/model/Teacher.kt
index 800ce1877..3438a93af 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/teacher/model/Teacher.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/teacher/model/Teacher.kt
@@ -15,6 +15,8 @@ class Teacher(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User?,
@@ -23,4 +25,4 @@ class Teacher(
     @JoinColumn(name = "club_id", nullable = false)
     val club: Club
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/university/model/Professor.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/university/model/Professor.kt
index 18c893307..3b9e3a2bc 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/university/model/Professor.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/university/model/Professor.kt
@@ -16,6 +16,8 @@ class Professor(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @OneToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "user_id", columnDefinition = "BINARY(16)")
     val user: User?,
@@ -28,4 +30,4 @@ class Professor(
     @JoinColumn(name = "university_id")
     val university: University
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file
diff --git a/bitgouel-domain/src/main/kotlin/team/msg/domain/user/model/User.kt b/bitgouel-domain/src/main/kotlin/team/msg/domain/user/model/User.kt
index 1f05d4e45..0e8ded56c 100644
--- a/bitgouel-domain/src/main/kotlin/team/msg/domain/user/model/User.kt
+++ b/bitgouel-domain/src/main/kotlin/team/msg/domain/user/model/User.kt
@@ -15,6 +15,8 @@ class User(
     @get:JvmName("getIdentifier")
     override var id: UUID,
 
+    override var ulid: String,
+
     @Column(columnDefinition = "VARBINARY(100)", nullable = false, unique = true)
     val email: String,
 
@@ -35,4 +37,4 @@ class User(
     @Column(columnDefinition = "VARCHAR(10)", nullable = false)
     val approveStatus: ApproveStatus
 
-) : BaseUUIDEntity(id)
\ No newline at end of file
+) : BaseUUIDEntity(id, ulid)
\ No newline at end of file