diff --git a/src/main/java/life/mosu/mosuserver/application/application/ApplicationService.java b/src/main/java/life/mosu/mosuserver/application/application/ApplicationService.java
index b969be97..b14f826b 100644
--- a/src/main/java/life/mosu/mosuserver/application/application/ApplicationService.java
+++ b/src/main/java/life/mosu/mosuserver/application/application/ApplicationService.java
@@ -3,14 +3,12 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Set;
-import java.util.stream.Collectors;
 import life.mosu.mosuserver.domain.application.AdmissionTicketImageJpaEntity;
 import life.mosu.mosuserver.domain.application.AdmissionTicketImageJpaRepository;
 import life.mosu.mosuserver.domain.application.ApplicationJpaEntity;
 import life.mosu.mosuserver.domain.application.ApplicationJpaRepository;
 import life.mosu.mosuserver.domain.application.ApplicationSchoolJpaRepository;
 import life.mosu.mosuserver.domain.applicationschool.ApplicationSchoolJpaEntity;
-import life.mosu.mosuserver.domain.school.AddressJpaVO;
 import life.mosu.mosuserver.domain.school.SchoolJpaEntity;
 import life.mosu.mosuserver.domain.school.SchoolJpaRepository;
 import life.mosu.mosuserver.global.exception.CustomRuntimeException;
@@ -38,38 +36,36 @@ public class ApplicationService {
     // 신청
     @Transactional
     public ApplicationResponse apply(Long userId, ApplicationRequest request) {
-        Set<ApplicationSchoolRequest> schools = request.schools();
-        List<ApplicationSchoolJpaEntity> schoolEntities = new ArrayList<>();
+        Set<ApplicationSchoolRequest> schoolRequests = request.schools();
+        List<ApplicationSchoolJpaEntity> savedEntities = new ArrayList<>();
 
-        Set<Long> schoolIds = schools.stream()
-                .map(ApplicationSchoolRequest::schoolId)
-                .collect(Collectors.toSet());
-
-        if (applicationSchoolJpaRepository.existsByUserIdAndSchoolIdIn(userId, schoolIds)) {
-            throw new CustomRuntimeException(ErrorCode.APPLICATION_SCHOOL_ALREADY_APPLIED);
-        }
-
-        ApplicationJpaEntity application = request.toEntity(userId);
-        ApplicationJpaEntity applicationJpaEntity = applicationJpaRepository.save(application);
-        Long applicationId = applicationJpaEntity.getId();
+        ApplicationJpaEntity application = applicationJpaRepository.save(request.toEntity(userId));
+        Long applicationId = application.getId();
 
         admissionTicketImageJpaRepository.save(
                 createAdmissionTicketImageIfPresent(request.admissionTicket(), applicationId));
 
-        schools.forEach(applicationSchoolRequest -> {
-            SchoolJpaEntity school = schoolJpaRepository.findById(
-                            applicationSchoolRequest.schoolId())
+        for (ApplicationSchoolRequest schoolRequest : schoolRequests) {
+            Long schoolId = schoolJpaRepository.findBySchoolNameAndAreaAndExamDate(
+                            schoolRequest.schoolName(),
+                            schoolRequest.validatedArea(schoolRequest.area()),
+                            schoolRequest.examDate())
+                    .orElseThrow(() -> new CustomRuntimeException(ErrorCode.SCHOOL_NOT_FOUND))
+                    .getId();
+
+            if (applicationSchoolJpaRepository.existsByUserIdAndSchoolId(userId, schoolId)) {
+                throw new CustomRuntimeException(ErrorCode.APPLICATION_SCHOOL_ALREADY_APPLIED);
+            }
+
+            SchoolJpaEntity school = schoolJpaRepository.findById(schoolId)
                     .orElseThrow(() -> new CustomRuntimeException(ErrorCode.SCHOOL_NOT_FOUND));
 
-            AddressJpaVO address = school.getAddress();
-            ApplicationSchoolJpaEntity applicationSchoolJpaEntity = applicationSchoolRequest.toEntity(
-                    userId, applicationId, address);
-            ApplicationSchoolJpaEntity saved = applicationSchoolJpaRepository.save(
-                    applicationSchoolJpaEntity);
-            schoolEntities.add(saved);
-        });
+            ApplicationSchoolJpaEntity applicationSchool = schoolRequest.toEntity(userId,
+                    applicationId, school);
+            savedEntities.add(applicationSchoolJpaRepository.save(applicationSchool));
+        }
 
-        return ApplicationResponse.of(applicationId, schoolEntities);
+        return ApplicationResponse.of(applicationId, savedEntities);
     }
 
 
diff --git a/src/main/java/life/mosu/mosuserver/domain/application/ApplicationSchoolJpaRepository.java b/src/main/java/life/mosu/mosuserver/domain/application/ApplicationSchoolJpaRepository.java
index 34167b99..4d8711b4 100644
--- a/src/main/java/life/mosu/mosuserver/domain/application/ApplicationSchoolJpaRepository.java
+++ b/src/main/java/life/mosu/mosuserver/domain/application/ApplicationSchoolJpaRepository.java
@@ -1,6 +1,5 @@
 package life.mosu.mosuserver.domain.application;
 
-import java.util.Collection;
 import java.util.List;
 import life.mosu.mosuserver.domain.applicationschool.ApplicationSchoolJpaEntity;
 import org.springframework.data.jpa.repository.JpaRepository;
@@ -8,8 +7,7 @@
 public interface ApplicationSchoolJpaRepository extends
         JpaRepository<ApplicationSchoolJpaEntity, Long> {
 
-
-    boolean existsByUserIdAndSchoolIdIn(Long userId, Collection<Long> schoolIds);
+    boolean existsByUserIdAndSchoolId(Long userId, Long schoolId);
 
     List<ApplicationSchoolJpaEntity> findAllByApplicationId(Long applicationId);
 
diff --git a/src/main/java/life/mosu/mosuserver/domain/school/Area.java b/src/main/java/life/mosu/mosuserver/domain/school/Area.java
index cd800a96..59936697 100644
--- a/src/main/java/life/mosu/mosuserver/domain/school/Area.java
+++ b/src/main/java/life/mosu/mosuserver/domain/school/Area.java
@@ -3,8 +3,7 @@
 public enum Area {
     DAECHI("대치"),
     MOKDONG("목동"),
-    DAEGU("대구");
-
+    NOWON("노원");
     private final String areaName;
 
     Area(String areaName) {
diff --git a/src/main/java/life/mosu/mosuserver/domain/school/SchoolJpaRepository.java b/src/main/java/life/mosu/mosuserver/domain/school/SchoolJpaRepository.java
index a034cbf6..ff9facf9 100644
--- a/src/main/java/life/mosu/mosuserver/domain/school/SchoolJpaRepository.java
+++ b/src/main/java/life/mosu/mosuserver/domain/school/SchoolJpaRepository.java
@@ -1,7 +1,11 @@
 package life.mosu.mosuserver.domain.school;
 
+import java.time.LocalDate;
+import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface SchoolJpaRepository extends JpaRepository<SchoolJpaEntity, Long> {
 
+    Optional<SchoolJpaEntity> findBySchoolNameAndAreaAndExamDate(String schoolName, Area area,
+            LocalDate examDate);
 }
diff --git a/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolRequest.java b/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolRequest.java
index 9418a42f..efaa2315 100644
--- a/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolRequest.java
+++ b/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolRequest.java
@@ -8,14 +8,12 @@
 import life.mosu.mosuserver.domain.application.Lunch;
 import life.mosu.mosuserver.domain.application.Subject;
 import life.mosu.mosuserver.domain.applicationschool.ApplicationSchoolJpaEntity;
-import life.mosu.mosuserver.domain.school.AddressJpaVO;
 import life.mosu.mosuserver.domain.school.Area;
+import life.mosu.mosuserver.domain.school.SchoolJpaEntity;
 import life.mosu.mosuserver.global.exception.CustomRuntimeException;
 import life.mosu.mosuserver.global.exception.ErrorCode;
 
 public record ApplicationSchoolRequest(
-        @NotNull(message = "학교 ID는 필수입니다.")
-        Long schoolId,
 
         @NotBlank(message = "학교 이름은 필수입니다.")
         String schoolName,
@@ -32,14 +30,14 @@ public record ApplicationSchoolRequest(
 ) {
 
     public ApplicationSchoolJpaEntity toEntity(Long userId, Long applicationId,
-            AddressJpaVO address) {
+            SchoolJpaEntity school) {
         return ApplicationSchoolJpaEntity.builder()
                 .userId(userId)
                 .applicationId(applicationId)
-                .schoolId(schoolId)
-                .schoolName(schoolName)
-                .area(validatedArea(area))
-                .address(address)
+                .schoolId(school.getId())
+                .schoolName(school.getSchoolName())
+                .area(school.getArea())
+                .address(school.getAddress())
                 .examDate(examDate)
                 .lunch(validatedLunch(lunch))
                 .subjects(validatedSubjects(subjects))
@@ -64,7 +62,7 @@ private Lunch validatedLunch(String lunch) {
         }
     }
 
-    private Area validatedArea(String area) {
+    public Area validatedArea(String area) {
         try {
             return Area.valueOf(area.toUpperCase());
         } catch (IllegalArgumentException e) {
diff --git a/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolResponse.java b/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolResponse.java
index 746f2bc0..336c1d3e 100644
--- a/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolResponse.java
+++ b/src/main/java/life/mosu/mosuserver/presentation/application/dto/ApplicationSchoolResponse.java
@@ -3,32 +3,33 @@
 import java.time.LocalDate;
 import java.util.Set;
 import java.util.stream.Collectors;
-import life.mosu.mosuserver.domain.application.Lunch;
 import life.mosu.mosuserver.domain.application.Subject;
 import life.mosu.mosuserver.domain.applicationschool.ApplicationSchoolJpaEntity;
-import life.mosu.mosuserver.domain.school.Area;
 
 public record ApplicationSchoolResponse(
         Long applicationSchoolId,
-        Area area,
+        String area,
         LocalDate examDate,
         String schoolName,
-        Lunch lunch,
+        String lunch,
         String examinationNumber,
         Set<String> subjects
 ) {
 
     public static ApplicationSchoolResponse from(ApplicationSchoolJpaEntity applicationSchool) {
+        String areaName = applicationSchool.getArea().getAreaName();
+        String lunchName = applicationSchool.getLunch().getLunchName();
+
         Set<String> subjectNames = applicationSchool.getSubjects().stream()
                 .map(Subject::getSubjectName)
                 .collect(Collectors.toSet());
 
         return new ApplicationSchoolResponse(
                 applicationSchool.getId(),
-                applicationSchool.getArea(),
+                areaName,
                 applicationSchool.getExamDate(),
                 applicationSchool.getSchoolName(),
-                applicationSchool.getLunch(),
+                lunchName,
                 applicationSchool.getExaminationNumber(),
                 subjectNames
         );