diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e4fa43170..7214fd800 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,4 +30,4 @@ jobs:
             --no-daemon
 
       - name: Run Detekt
-        run: ./gradlew detekt
\ No newline at end of file
+        run: ./gradlew :dms-application:detekt
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
index f5f5f0a5e..3a96529c1 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -39,6 +39,8 @@ subprojects {
         // test
         implementation(Dependencies.SPRING_TEST)
         implementation(Dependencies.MOCKK)
+
+        detektPlugins(Dependencies.DETEKT)
     }
 }
 
diff --git a/buildSrc/src/main/kotlin/Dependencies.kt b/buildSrc/src/main/kotlin/Dependencies.kt
index f7b33c808..cfefdeccb 100644
--- a/buildSrc/src/main/kotlin/Dependencies.kt
+++ b/buildSrc/src/main/kotlin/Dependencies.kt
@@ -52,4 +52,7 @@ object Dependencies {
     // excel
     const val APACHE_POI = "org.apache.poi:poi:${DependencyVersions.APACHE_POI_VERSION}"
     const val APACHE_POI_OOXML = "org.apache.poi:poi-ooxml:${DependencyVersions.APACHE_POI_VERSION}"
+
+    // detekt
+    const val DETEKT = "io.gitlab.arturbosch.detekt:detekt-formatting:${PluginVersions.DETEKT_VERSION}"
 }
\ No newline at end of file
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/auth/spi/AuthQueryUserPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/auth/spi/AuthQueryUserPort.kt
index 4f9e60e0f..63f6b94a8 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/auth/spi/AuthQueryUserPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/auth/spi/AuthQueryUserPort.kt
@@ -9,5 +9,5 @@ interface AuthQueryUserPort {
 
     fun queryUserByAccountId(accountId: String): User?
 
-    fun queryUserById(id: UUID): User?
+    fun queryUserById(userId: UUID): User?
 }
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandRemainStatusPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandRemainStatusPort.kt
index 2e2b8ceec..62ffffa8b 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandRemainStatusPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandRemainStatusPort.kt
@@ -4,4 +4,4 @@ import java.util.UUID
 
 interface ManagerCommandRemainStatusPort {
     fun deleteByStudentId(studentId: UUID)
-}
\ No newline at end of file
+}
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandStudyRoomPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandStudyRoomPort.kt
index eae8185c5..c4d104636 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandStudyRoomPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerCommandStudyRoomPort.kt
@@ -8,4 +8,4 @@ interface ManagerCommandStudyRoomPort {
     fun saveSeat(seat: Seat): Seat
 
     fun saveStudyRoom(studyRoom: StudyRoom): StudyRoom
-}
\ No newline at end of file
+}
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerQueryStudyRoomPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerQueryStudyRoomPort.kt
index 6e80a9911..27adb38fe 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerQueryStudyRoomPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/spi/ManagerQueryStudyRoomPort.kt
@@ -9,4 +9,4 @@ interface ManagerQueryStudyRoomPort {
     fun querySeatByStudentId(studentId: UUID): Seat?
 
     fun queryStudyRoomById(studyRoomId: UUID): StudyRoom?
-}
\ No newline at end of file
+}
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCase.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCase.kt
index f9a5b24e0..af8e3e422 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCase.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCase.kt
@@ -53,17 +53,6 @@ class RemoveStudentUseCase(
         // 잔류 내역 삭제
         commandRemainStatusPort.deleteByStudentId(studentId)
 
-        // 자습실 신청 상태 제거
-        queryStudyRoomPort.querySeatByStudentId(studentId)?.let { seat ->
-            val studyRoom = queryStudyRoomPort.queryStudyRoomById(seat.studyRoomId) ?: throw StudyRoomNotFoundException
-            commandStudyRoomPort.saveSeat(
-                seat.unUse()
-            )
-            commandStudyRoomPort.saveStudyRoom(
-                studyRoom.unApply()
-            )
-        }
-
         commandUserPort.saveUser(
             studentUser.copy(deletedAt = LocalDateTime.now())
         )
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/meal/usecase/QueryMealsUseCase.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/meal/usecase/QueryMealsUseCase.kt
index 938d2137a..7d260e368 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/meal/usecase/QueryMealsUseCase.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/meal/usecase/QueryMealsUseCase.kt
@@ -37,9 +37,7 @@ class QueryMealsUseCase(
             if (meals == null) {
                 mealDetails.add(MealDetails.emptyOf(date))
             } else {
-                meals[0].apply {
-                    mealDetails.add(MealDetails.of(this))
-                }
+                mealDetails.add(MealDetails.of(meals[0]))
             }
         }
 
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/remain/spi/RemainStatusPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/remain/spi/RemainStatusPort.kt
index d395ea98d..d1ba98072 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/remain/spi/RemainStatusPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/remain/spi/RemainStatusPort.kt
@@ -7,5 +7,4 @@ interface RemainStatusPort :
     CommandRemainStatusPort,
     QueryRemainStatusPort,
     StudentCommandRemainStatusPort,
-    ManagerCommandRemainStatusPort {
-}
\ No newline at end of file
+    ManagerCommandRemainStatusPort
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/CommandStudentPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/CommandStudentPort.kt
index def55cb4f..bf1076aa5 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/CommandStudentPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/CommandStudentPort.kt
@@ -10,5 +10,4 @@ interface CommandStudentPort {
     fun saveAllVerifiedStudent(verifiedStudents: List<VerifiedStudent>)
 
     fun deleteVerifiedStudent(verifiedStudent: VerifiedStudent)
-
 }
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandRemainStatusPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandRemainStatusPort.kt
index 8c9cbb0e9..979b68a33 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandRemainStatusPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandRemainStatusPort.kt
@@ -4,4 +4,4 @@ import java.util.UUID
 
 interface StudentCommandRemainStatusPort {
     fun deleteByStudentId(studentId: UUID)
-}
\ No newline at end of file
+}
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandStudyRoomPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandStudyRoomPort.kt
index 58c591db2..b9ac5f549 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandStudyRoomPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentCommandStudyRoomPort.kt
@@ -8,4 +8,4 @@ interface StudentCommandStudyRoomPort {
     fun saveSeat(seat: Seat): Seat
 
     fun saveStudyRoom(studyRoom: StudyRoom): StudyRoom
-}
\ No newline at end of file
+}
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentQueryStudyRoomPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentQueryStudyRoomPort.kt
index 3f9a97ae7..fc15d82c6 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentQueryStudyRoomPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/spi/StudentQueryStudyRoomPort.kt
@@ -9,4 +9,4 @@ interface StudentQueryStudyRoomPort {
     fun querySeatByStudentId(studentId: UUID): Seat?
 
     fun queryStudyRoomById(studyRoomId: UUID): StudyRoom?
-}
\ No newline at end of file
+}
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCase.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCase.kt
index 6fc793900..fe5e62161 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCase.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCase.kt
@@ -61,13 +61,11 @@ class SignUpUseCase(
         validateAuthCode(authCode, email)
         validateUserDuplicated(accountId, email)
 
-        val gcn = "${grade}${classRoom}${Student.processNumber(number)}"
-
         /**
          * 검증된 학생 조회
          **/
         val verifiedStudent = queryVerifiedStudentPort.queryVerifiedStudentByGcnAndSchoolName(
-            gcn = gcn,
+            gcn = "${grade}${classRoom}${Student.processNumber(number)}",
             schoolName = school.name
         ) ?: throw VerifiedStudentNotFoundException
 
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCase.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCase.kt
index 0c35abde8..748d87e11 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCase.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCase.kt
@@ -43,4 +43,4 @@ class StudentWithdrawalUseCase(
             studentUser.copy(deletedAt = LocalDateTime.now())
         )
     }
-}
\ No newline at end of file
+}
diff --git a/dms-application/src/main/kotlin/team/aliens/dms/domain/studyroom/spi/StudyRoomPort.kt b/dms-application/src/main/kotlin/team/aliens/dms/domain/studyroom/spi/StudyRoomPort.kt
index 7eb418478..51b0db239 100644
--- a/dms-application/src/main/kotlin/team/aliens/dms/domain/studyroom/spi/StudyRoomPort.kt
+++ b/dms-application/src/main/kotlin/team/aliens/dms/domain/studyroom/spi/StudyRoomPort.kt
@@ -5,12 +5,11 @@ import team.aliens.dms.domain.manager.spi.ManagerQueryStudyRoomPort
 import team.aliens.dms.domain.student.spi.StudentCommandStudyRoomPort
 import team.aliens.dms.domain.student.spi.StudentQueryStudyRoomPort
 
-interface StudyRoomPort:
+interface StudyRoomPort :
     QueryStudyRoomPort,
     CommandStudyRoomPort,
     SeatTypeQueryStudyRoomPort,
     StudentQueryStudyRoomPort,
     StudentCommandStudyRoomPort,
     ManagerQueryStudyRoomPort,
-    ManagerCommandStudyRoomPort {
-}
\ No newline at end of file
+    ManagerCommandStudyRoomPort
diff --git a/dms-application/src/test/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCaseTests.kt b/dms-application/src/test/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCaseTests.kt
index 5ecbf0b5e..95a879f63 100644
--- a/dms-application/src/test/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCaseTests.kt
+++ b/dms-application/src/test/kotlin/team/aliens/dms/domain/manager/usecase/RemoveStudentUseCaseTests.kt
@@ -58,7 +58,8 @@ class RemoveStudentUseCaseTests {
     @BeforeEach
     fun setUp() {
         removeStudentUseCase = RemoveStudentUseCase(
-            securityPort, queryUserPort, queryStudentPort, commandRemainStatusPort, queryStudyRoomPort, commandStudyRoomPort, commandUserPort
+            securityPort, queryUserPort, queryStudentPort, commandRemainStatusPort,
+            queryStudyRoomPort, commandStudyRoomPort, commandUserPort
         )
     }
 
diff --git a/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCaseTests.kt b/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCaseTests.kt
index 0f289294b..9250e5289 100644
--- a/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCaseTests.kt
+++ b/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/SignUpUseCaseTests.kt
@@ -147,26 +147,6 @@ class SignUpUseCaseTests {
         )
     }
 
-    private val tokenResponseStub by lazy {
-        TokenResponse(
-            accessToken = "test access token",
-            accessTokenExpiredAt = LocalDateTime.now(),
-            refreshToken = "test refresh token",
-            refreshTokenExpiredAt = LocalDateTime.now()
-        )
-    }
-
-    private val featureStub by lazy {
-        AvailableFeature(
-            schoolId = userStub.schoolId,
-            mealService = true,
-            noticeService = true,
-            pointService = true,
-            studyRoomService = false,
-            remainService = true
-        )
-    }
-
     private val gcnStub = "${requestStub.grade}${requestStub.classRoom}${Student.processNumber(requestStub.number)}"
 
 //    @Test
diff --git a/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCaseTests.kt b/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCaseTests.kt
index 94a4a65cd..b9305bfba 100644
--- a/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCaseTests.kt
+++ b/dms-application/src/test/kotlin/team/aliens/dms/domain/student/usecase/StudentWithdrawalUseCaseTests.kt
@@ -109,4 +109,4 @@ class StudentWithdrawalUseCaseTests {
             studentWithdrawalUseCase.execute()
         }
     }
-}
\ No newline at end of file
+}