diff --git a/backend/src/main/java/com/carffeine/carffeine/controller/chargerStation/dto/CongestionResponse.java b/backend/src/main/java/com/carffeine/carffeine/controller/chargerStation/dto/CongestionResponse.java
index f63a1b319..3116454e3 100644
--- a/backend/src/main/java/com/carffeine/carffeine/controller/chargerStation/dto/CongestionResponse.java
+++ b/backend/src/main/java/com/carffeine/carffeine/controller/chargerStation/dto/CongestionResponse.java
@@ -3,6 +3,6 @@
 import java.util.List;
 import java.util.Map;
 
-public record CongestionResponse(Map<String, List<CongestionInfoResponse>> STANDARD,
-                                 Map<String, List<CongestionInfoResponse>> QUICK) {
+public record CongestionResponse(Map<String, List<CongestionInfoResponse>> standard,
+                                 Map<String, List<CongestionInfoResponse>> quick) {
 }
diff --git a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/Charger.java b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/Charger.java
index 40f18e71a..cde2caad7 100644
--- a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/Charger.java
+++ b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/Charger.java
@@ -28,6 +28,7 @@
 @Entity
 @Table(name = "charger")
 public class Charger {
+    private static final BigDecimal OUTPUT_THRESHOLD = BigDecimal.valueOf(50);
 
     @Id
     @Column(name = "station_id")
@@ -62,4 +63,11 @@ public class Charger {
     public boolean isAvailable() {
         return chargerStatus.isAvailable();
     }
+
+    public boolean isQuick() {
+        if (capacity == null) {
+            return false;
+        }
+        return capacity.compareTo(OUTPUT_THRESHOLD) >= 0;
+    }
 }
diff --git a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerRepository.java b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerRepository.java
index 37f7a9cbe..2b234f741 100644
--- a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerRepository.java
+++ b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerRepository.java
@@ -5,5 +5,6 @@
 import java.util.List;
 
 public interface ChargerRepository extends Repository<Charger, String> {
+    
     List<Charger> findAllByStationId(String stationId);
 }
diff --git a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerState.java b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerState.java
index aeded7bd5..c6cfbbb08 100644
--- a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerState.java
+++ b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerState.java
@@ -4,19 +4,17 @@
 
 public enum ChargerState {
 
-    COMMUNICATION_ERROR(1, "1"),
-    STANDBY(2, "2"),
-    CHARGING_IN_PROGRESS(3, "3"),
-    OPERATION_SUSPENDED(4, "4"),
-    UNDER_INSPECTION(5, "5"),
-    STATUS_UNKNOWN(9, "9");
+    COMMUNICATION_ERROR(1),
+    STANDBY(2),
+    CHARGING_IN_PROGRESS(3),
+    OPERATION_SUSPENDED(4),
+    UNDER_INSPECTION(5),
+    STATUS_UNKNOWN(9);
 
     private final int value;
-    private final String valueString;
 
-    ChargerState(int value, String valueString) {
+    ChargerState(int value) {
         this.value = value;
-        this.valueString = valueString;
     }
 
     public static ChargerState from(int input) {
@@ -28,7 +26,7 @@ public static ChargerState from(int input) {
 
     public static ChargerState from(String input) {
         return Arrays.stream(ChargerState.values())
-                .filter(it -> it.valueString.equals(input))
+                .filter(it -> it.value == input.charAt(0) - '0')
                 .findAny()
                 .orElse(STATUS_UNKNOWN);
     }
diff --git a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerStatus.java b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerStatus.java
index 227a82f0f..f7f3de9c7 100644
--- a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerStatus.java
+++ b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/charger/ChargerStatus.java
@@ -19,7 +19,7 @@
 @ToString
 @Getter
 @Builder
-@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@AllArgsConstructor
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 @IdClass(ChargerId.class)
 @Entity
diff --git a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/PeriodicCongestion.java b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/PeriodicCongestion.java
index 79d97b9ac..c8777e786 100644
--- a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/PeriodicCongestion.java
+++ b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/PeriodicCongestion.java
@@ -33,10 +33,10 @@ public class PeriodicCongestion {
     private double congestion;
 
     @ManyToOne
-    @JoinColumns({
-            @JoinColumn(name = "station_id", referencedColumnName = "station_id", insertable = false, updatable = false, foreignKey = @ForeignKey(value = ConstraintMode.NO_CONSTRAINT)),
-            @JoinColumn(name = "charger_id", referencedColumnName = "charger_id", insertable = false, updatable = false, foreignKey = @ForeignKey(value = ConstraintMode.NO_CONSTRAINT))
-    })
+    @JoinColumns(value = {
+            @JoinColumn(name = "station_id", referencedColumnName = "station_id", insertable = false, updatable = false),
+            @JoinColumn(name = "charger_id", referencedColumnName = "charger_id", insertable = false, updatable = false)
+    }, foreignKey = @ForeignKey(value = ConstraintMode.NO_CONSTRAINT))
     private Charger charger;
 
     @Column(name = "station_id")
diff --git a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/RequestPeriod.java b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/RequestPeriod.java
index 5d920ce15..b6fa5208c 100644
--- a/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/RequestPeriod.java
+++ b/backend/src/main/java/com/carffeine/carffeine/domain/chargestation/congestion/RequestPeriod.java
@@ -12,10 +12,11 @@ public enum RequestPeriod {
     ZERO(0),
     TWELVE(1200);
 
+    private static final int UNIT = 100;
     private static final List<RequestPeriod> periods = Arrays.stream(values())
             .sorted(Comparator.comparingInt(RequestPeriod::getSection))
             .toList();
-    private static final int UNIT = 100;
+
     private final int section;
 
     RequestPeriod(int section) {
diff --git a/backend/src/main/java/com/carffeine/carffeine/infra/api/RestTemplateChargeStationRequester.java b/backend/src/main/java/com/carffeine/carffeine/infra/api/RestTemplateChargeStationRequester.java
index 9664b3871..da77fc2a1 100644
--- a/backend/src/main/java/com/carffeine/carffeine/infra/api/RestTemplateChargeStationRequester.java
+++ b/backend/src/main/java/com/carffeine/carffeine/infra/api/RestTemplateChargeStationRequester.java
@@ -47,7 +47,7 @@ public ChargeStationRequest requestChargeStationRequest(int pageNo) {
     }
 
     @Override
-    public ChargerStateUpdateRequest requestChargerStatusUpdateRequest(int pageNo) {
+    public ChargerStateUpdateRequest requestChargerStatusUpdate(int pageNo) {
         while (true) {
             try {
                 ChargerStateUpdateRequest result = requestChargeStateUpdateRequestWithRetry(pageNo);
diff --git a/backend/src/main/java/com/carffeine/carffeine/infra/repository/ChargerStatusCustomRepositoryImpl.java b/backend/src/main/java/com/carffeine/carffeine/infra/repository/ChargerStatusCustomRepositoryImpl.java
index 025728887..f7fa67611 100644
--- a/backend/src/main/java/com/carffeine/carffeine/infra/repository/ChargerStatusCustomRepositoryImpl.java
+++ b/backend/src/main/java/com/carffeine/carffeine/infra/repository/ChargerStatusCustomRepositoryImpl.java
@@ -1,8 +1,7 @@
 package com.carffeine.carffeine.infra.repository;
 
-import com.carffeine.carffeine.domain.chargestation.charger.ChargerState;
+import com.carffeine.carffeine.domain.chargestation.charger.ChargerStatus;
 import com.carffeine.carffeine.service.chargerstation.ChargerStatusCustomRepository;
-import com.carffeine.carffeine.service.chargerstation.dto.ChargerStateRequest;
 import lombok.RequiredArgsConstructor;
 import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
 import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
@@ -10,8 +9,6 @@
 import org.springframework.stereotype.Repository;
 import org.springframework.transaction.annotation.Transactional;
 
-import java.time.LocalDateTime;
-import java.time.format.DateTimeFormatter;
 import java.util.List;
 
 @RequiredArgsConstructor
@@ -22,30 +19,21 @@ public class ChargerStatusCustomRepositoryImpl implements ChargerStatusCustomRep
 
     @Override
     @Transactional
-    public void saveAll(List<ChargerStateRequest> item) {
+    public void saveAll(List<ChargerStatus> chargerStatuses) {
         String sql = "INSERT INTO charger_status (station_id, charger_id, latest_update_time, charger_state) " +
                 "VALUES (:stationId, :chargerId, :latestUpdateTime, :chargerState) " +
                 "ON DUPLICATE KEY UPDATE latest_update_time = :latestUpdateTime, charger_state = :chargerState";
-        SqlParameterSource[] sqlParameterSources = item.stream()
+        SqlParameterSource[] sqlParameterSources = chargerStatuses.stream()
                 .map(this::changeToSqlParameterSource)
                 .toArray(SqlParameterSource[]::new);
         namedParameterJdbcTemplate.batchUpdate(sql, sqlParameterSources);
     }
 
-    private MapSqlParameterSource changeToSqlParameterSource(ChargerStateRequest item) {
+    private MapSqlParameterSource changeToSqlParameterSource(ChargerStatus item) {
         return new MapSqlParameterSource()
-                .addValue("stationId", item.statId())
-                .addValue("chargerId", item.chgerId())
-                .addValue("latestUpdateTime", parseDateTimeFromString(item.statUpdDt()))
-                .addValue("chargerState", ChargerState.from(item.stat()).name());
-    }
-
-    private LocalDateTime parseDateTimeFromString(String input) {
-        if (input == null || input.length() != 14) {
-            return null;
-        }
-
-        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");
-        return LocalDateTime.parse(input, formatter);
+                .addValue("stationId", item.getStationId())
+                .addValue("chargerId", item.getChargerId())
+                .addValue("latestUpdateTime", item.getLatestUpdateTime())
+                .addValue("chargerState", item.getChargerState().name());
     }
 }
diff --git a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateRequester.java b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateRequester.java
index e098e77f2..ce523a2b4 100644
--- a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateRequester.java
+++ b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateRequester.java
@@ -4,5 +4,5 @@
 
 public interface ChargerStateRequester {
 
-    ChargerStateUpdateRequest requestChargerStatusUpdateRequest(int pageNo);
+    ChargerStateUpdateRequest requestChargerStatusUpdate(int pageNo);
 }
diff --git a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateUpdateService.java b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateUpdateService.java
index 45477868b..b5f2306f5 100644
--- a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateUpdateService.java
+++ b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStateUpdateService.java
@@ -1,5 +1,6 @@
 package com.carffeine.carffeine.service.chargerstation;
 
+import com.carffeine.carffeine.domain.chargestation.charger.ChargerStatus;
 import com.carffeine.carffeine.service.chargerstation.dto.ChargerStateRequest;
 import com.carffeine.carffeine.service.chargerstation.dto.ChargerStateUpdateRequest;
 import lombok.RequiredArgsConstructor;
@@ -25,8 +26,11 @@ public void update() {
     }
 
     private void updateChargerState(int pageNo) {
-        ChargerStateUpdateRequest chargerStateUpdateRequest = chargerStateRequester.requestChargerStatusUpdateRequest(pageNo);
+        ChargerStateUpdateRequest chargerStateUpdateRequest = chargerStateRequester.requestChargerStatusUpdate(pageNo);
         List<ChargerStateRequest> chargerStateRequests = chargerStateUpdateRequest.items().item();
-        chargerStatusCustomRepository.saveAll(chargerStateRequests);
+        List<ChargerStatus> chargerStatuses = chargerStateRequests.stream()
+                .map(ChargerStateRequest::toChargerStatus)
+                .toList();
+        chargerStatusCustomRepository.saveAll(chargerStatuses);
     }
 }
diff --git a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStatusCustomRepository.java b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStatusCustomRepository.java
index 4fd32af06..a7abf5b86 100644
--- a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStatusCustomRepository.java
+++ b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/ChargerStatusCustomRepository.java
@@ -1,10 +1,10 @@
 package com.carffeine.carffeine.service.chargerstation;
 
-import com.carffeine.carffeine.service.chargerstation.dto.ChargerStateRequest;
+import com.carffeine.carffeine.domain.chargestation.charger.ChargerStatus;
 
 import java.util.List;
 
 public interface ChargerStatusCustomRepository {
 
-    void saveAll(List<ChargerStateRequest> item);
+    void saveAll(List<ChargerStatus> item);
 }
diff --git a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/CongestionService.java b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/CongestionService.java
index 65d427684..74fd2aa3c 100644
--- a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/CongestionService.java
+++ b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/CongestionService.java
@@ -46,7 +46,7 @@ public StatisticsResponse calculateCongestion(StatisticsRequest statisticsReques
 
     private Map<String, List<CongestionInfoResponse>> calculateQuick(List<PeriodicCongestion> congestions, List<Charger> chargers) {
         List<String> quickChargerIds = chargers.stream()
-                .filter(it -> it.getCapacity().intValue() >= OUTPUT_THRESHOLD)
+                .filter(Charger::isQuick)
                 .map(Charger::getChargerId)
                 .toList();
 
@@ -55,7 +55,7 @@ private Map<String, List<CongestionInfoResponse>> calculateQuick(List<PeriodicCo
 
     private Map<String, List<CongestionInfoResponse>> calculateStandard(List<PeriodicCongestion> congestions, List<Charger> chargers) {
         List<String> standardChargerIds = chargers.stream()
-                .filter(it -> it.getCapacity().intValue() < OUTPUT_THRESHOLD)
+                .filter(it -> !it.isQuick())
                 .map(Charger::getChargerId)
                 .toList();
 
diff --git a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/dto/ChargerStateRequest.java b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/dto/ChargerStateRequest.java
index 8dba6465e..8e5d46ef5 100644
--- a/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/dto/ChargerStateRequest.java
+++ b/backend/src/main/java/com/carffeine/carffeine/service/chargerstation/dto/ChargerStateRequest.java
@@ -1,5 +1,11 @@
 package com.carffeine.carffeine.service.chargerstation.dto;
 
+import com.carffeine.carffeine.domain.chargestation.charger.ChargerState;
+import com.carffeine.carffeine.domain.chargestation.charger.ChargerStatus;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
 public record ChargerStateRequest(
         String busiId,
         String statId,
@@ -9,4 +15,23 @@ public record ChargerStateRequest(
         String lastTsdt,
         String lastTedt,
         String nowTsdt) {
+
+    private static final int DATETIME_LENGTH = 14;
+
+    public ChargerStatus toChargerStatus() {
+        return ChargerStatus.builder()
+                .stationId(statId)
+                .chargerId(chgerId)
+                .latestUpdateTime(parseDateTimeFromString(statUpdDt))
+                .chargerState(ChargerState.from(stat))
+                .build();
+    }
+
+    private LocalDateTime parseDateTimeFromString(String input) {
+        if (input == null || input.length() != DATETIME_LENGTH) {
+            return null;
+        }
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMddHHmmss");
+        return LocalDateTime.parse(input, formatter);
+    }
 }
diff --git a/backend/src/test/java/com/carffeine/carffeine/infra/repository/ChargerStatusRepositoryImplTest.java b/backend/src/test/java/com/carffeine/carffeine/infra/repository/ChargerStatusRepositoryImplTest.java
index df70dd4bc..71d898ef9 100644
--- a/backend/src/test/java/com/carffeine/carffeine/infra/repository/ChargerStatusRepositoryImplTest.java
+++ b/backend/src/test/java/com/carffeine/carffeine/infra/repository/ChargerStatusRepositoryImplTest.java
@@ -1,17 +1,16 @@
 package com.carffeine.carffeine.infra.repository;
 
+import com.carffeine.carffeine.domain.chargestation.charger.ChargerState;
 import com.carffeine.carffeine.domain.chargestation.charger.ChargerStatus;
 import com.carffeine.carffeine.domain.chargestation.charger.ChargerStatusRepository;
 import com.carffeine.carffeine.service.chargerstation.ChargerStatusCustomRepository;
-import com.carffeine.carffeine.service.chargerstation.dto.ChargerStateRequest;
-import com.carffeine.carffeine.service.chargerstation.dto.ChargerStateUpdateRequest;
-import com.carffeine.carffeine.service.chargerstation.dto.ChargersStateRequest;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
 import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
 import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
 
+import java.time.LocalDateTime;
 import java.util.List;
 
 import static org.assertj.core.api.Assertions.assertThat;
@@ -20,8 +19,13 @@
 @AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE)
 class ChargerStatusRepositoryImplTest {
 
-    private final ChargerStateUpdateRequest request = new ChargerStateUpdateRequest(
-            3, new ChargersStateRequest(List.of(new ChargerStateRequest("ME", "13", "45", "2", "updateDate", "lastTsdt", "lastTedt", "nowTsdt"))), 1, "3", 5
+    private static final List<ChargerStatus> chargerStatuses = List.of(
+            new ChargerStatus(
+                    "stationId",
+                    "chargerId",
+                    LocalDateTime.of(2021, 1, 1, 0, 0, 0),
+                    ChargerState.CHARGING_IN_PROGRESS
+            )
     );
 
     private ChargerStatusCustomRepository chargerStatusCustomRepository;
@@ -34,8 +38,8 @@ void setUp(NamedParameterJdbcTemplate namedParameterJdbcTemplate, ChargerStatusR
     }
 
     @Test
-    void 저장() {
-        chargerStatusCustomRepository.saveAll(request.items().item());
+    void 상태를_저장한다() {
+        chargerStatusCustomRepository.saveAll(chargerStatuses);
 
         List<ChargerStatus> result = chargerStatusRepository.findAll();
 
diff --git a/backend/src/test/java/com/carffeine/carffeine/service/chargerstation/CongestionServiceTest.java b/backend/src/test/java/com/carffeine/carffeine/service/chargerstation/CongestionServiceTest.java
index 0b1b85290..288a7b6fd 100644
--- a/backend/src/test/java/com/carffeine/carffeine/service/chargerstation/CongestionServiceTest.java
+++ b/backend/src/test/java/com/carffeine/carffeine/service/chargerstation/CongestionServiceTest.java
@@ -6,7 +6,6 @@
 import com.carffeine.carffeine.domain.chargestation.charger.ChargerRepository;
 import com.carffeine.carffeine.domain.chargestation.congestion.PeriodicCongestionRepository;
 import com.carffeine.carffeine.service.chargerstation.dto.StatisticsRequest;
-import org.assertj.core.api.Assertions;
 import org.junit.jupiter.api.DisplayNameGeneration;
 import org.junit.jupiter.api.DisplayNameGenerator.ReplaceUnderscores;
 import org.junit.jupiter.api.Test;
@@ -17,6 +16,8 @@
 import java.util.List;
 import java.util.Map;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 @DisplayNameGeneration(ReplaceUnderscores.class)
 @SuppressWarnings("NonAsciiCharacters")
 @DataJpaTest
@@ -30,13 +31,13 @@ void setCongestionService(PeriodicCongestionRepository periodicCongestionReposit
     }
 
     @Test
-    void 혼잡도_계산() {
+    void 상태값이_없는_데이터일_경우_음수가_반환된다() {
         StatisticsRequest statisticsRequest = new StatisticsRequest("ME174003");
         StatisticsResponse statisticsResponse = congestionService.calculateCongestion(statisticsRequest);
 
         CongestionResponse expected = getExpected();
 
-        Assertions.assertThat(expected).usingRecursiveComparison()
+        assertThat(expected).usingRecursiveComparison()
                 .isEqualTo(statisticsResponse.congestion());
     }