diff --git a/build.gradle b/build.gradle
index 741a97c3..32de6923 100644
--- a/build.gradle
+++ b/build.gradle
@@ -64,6 +64,9 @@ dependencies {
     // AWS S3 의존성
     implementation 'software.amazon.awssdk:s3:2.17.70'
     implementation 'org.springframework.cloud:spring-cloud-starter-aws:2.2.6.RELEASE'
+
+    // 레디스 의존성
+    implementation 'org.redisson:redisson-spring-boot-starter:3.23.2'
 }
 
 tasks.named('test') {
diff --git a/src/main/java/com/brainpix/BrainpixApplication.java b/src/main/java/com/brainpix/BrainpixApplication.java
index d2d4645f..8f16b885 100644
--- a/src/main/java/com/brainpix/BrainpixApplication.java
+++ b/src/main/java/com/brainpix/BrainpixApplication.java
@@ -1,17 +1,19 @@
 package com.brainpix;
 
-import jakarta.annotation.PostConstruct;
-
 import java.util.TimeZone;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.data.mongodb.config.EnableMongoAuditing;
 import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+import jakarta.annotation.PostConstruct;
 
 @SpringBootApplication
 @EnableMongoAuditing
 @EnableMongoRepositories(basePackages = {"com.brainpix.message.repository", "com.brainpix.alarm.repository"})
+@EnableScheduling
 public class BrainpixApplication {
 
 	@PostConstruct
diff --git a/src/main/java/com/brainpix/api/code/error/KakaoPayErrorCode.java b/src/main/java/com/brainpix/api/code/error/KakaoPayErrorCode.java
index c5f590c2..dcb614a9 100644
--- a/src/main/java/com/brainpix/api/code/error/KakaoPayErrorCode.java
+++ b/src/main/java/com/brainpix/api/code/error/KakaoPayErrorCode.java
@@ -13,6 +13,9 @@ public enum KakaoPayErrorCode implements ErrorCode {
 	IDEA_OWNER_PURCHASE_INVALID(HttpStatus.BAD_REQUEST, "KAKAOPAY400", "글 작성자는 구매할 수 없습니다."),
 	QUANTITY_INVALID(HttpStatus.BAD_REQUEST, "KAKAOPAY400", "구매 수량은 재고를 초과할 수 없습니다."),
 
+	// 404 Not Found - 리소스를 찾을 수 없음
+	PAYMENT_DATA_NOT_FOUND(HttpStatus.NOT_FOUND, "KAKAOPAY404", "결제 정보를 찾을 수 없습니다."),
+
 	// 500 Internal Server Error - 서버 내부 오류
 	API_RESPONSE_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "KAKAOPAY500", "카카오페이 API 호출 중 오류가 발생하였습니다.");
 
diff --git a/src/main/java/com/brainpix/config/RedisConfig.java b/src/main/java/com/brainpix/config/RedisConfig.java
new file mode 100644
index 00000000..44c14487
--- /dev/null
+++ b/src/main/java/com/brainpix/config/RedisConfig.java
@@ -0,0 +1,28 @@
+package com.brainpix.config;
+
+import org.redisson.Redisson;
+import org.redisson.api.RedissonClient;
+import org.redisson.config.Config;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class RedisConfig {
+
+	@Value("${spring.redis.host}")
+	private String host;
+
+	@Value("${spring.redis.port}")
+	private Integer port;
+
+	@Bean
+	public RedissonClient redissonClient() {
+		Config config = new Config();
+		config.useSingleServer()
+			.setAddress("redis://" + host + ":" + port)    // TLS이면 rediss://
+			.setConnectionMinimumIdleSize(10)
+			.setConnectionPoolSize(50);
+		return Redisson.create(config);
+	}
+}
diff --git a/src/main/java/com/brainpix/kakaopay/api_client/KakaoPayApiClient.java b/src/main/java/com/brainpix/kakaopay/api_client/KakaoPayApiClient.java
index 31d64efa..65195f87 100644
--- a/src/main/java/com/brainpix/kakaopay/api_client/KakaoPayApiClient.java
+++ b/src/main/java/com/brainpix/kakaopay/api_client/KakaoPayApiClient.java
@@ -12,7 +12,7 @@
 
 import com.brainpix.kakaopay.dto.KakaoPayApproveDto;
 import com.brainpix.kakaopay.dto.KakaoPayReadyDto;
-import com.brainpix.kakaopay.entity.KakaoPaymentData;
+import com.brainpix.kakaopay.dto.KakaoPaymentDataDto;
 import com.brainpix.post.entity.idea_market.IdeaMarket;
 import com.brainpix.user.entity.User;
 
@@ -51,7 +51,7 @@ public KakaoPayReadyDto.KakaoApiResponse requestPaymentReady(
 
 	// 카카오페이 결제 승인 API
 	public KakaoPayApproveDto.KakaoApiResponse requestPaymentApprove(
-		KakaoPayApproveDto.Parameter parameter, KakaoPaymentData kakaoPaymentData) {
+		KakaoPayApproveDto.Parameter parameter, KakaoPaymentDataDto kakaoPaymentData) {
 
 		Map<String, String> parameters = getApproveParams(parameter, kakaoPaymentData);
 		HttpHeaders headers = getHeaders();
@@ -89,14 +89,14 @@ private Map<String, String> getReadyParams(
 
 	// 결제 승인 파라미터 생성
 	private Map<String, String> getApproveParams(KakaoPayApproveDto.Parameter parameter,
-		KakaoPaymentData kakaoPaymentData) {
+		KakaoPaymentDataDto kakaoPaymentData) {
 
 		Map<String, String> params = new HashMap<>();
 
 		params.put("cid", cid);
 		params.put("tid", kakaoPaymentData.getTid());
 		params.put("partner_order_id", parameter.getOrderId());
-		params.put("partner_user_id", String.valueOf(kakaoPaymentData.getBuyer().getId()));
+		params.put("partner_user_id", String.valueOf(kakaoPaymentData.getBuyerId()));
 		params.put("pg_token", parameter.getPgToken());
 
 		return params;
diff --git a/src/main/java/com/brainpix/kakaopay/controller/KakaoPayController.java b/src/main/java/com/brainpix/kakaopay/controller/KakaoPayController.java
index b3f5c447..d8b3d24e 100644
--- a/src/main/java/com/brainpix/kakaopay/controller/KakaoPayController.java
+++ b/src/main/java/com/brainpix/kakaopay/controller/KakaoPayController.java
@@ -30,7 +30,7 @@ public class KakaoPayController {
 	private final KakaoPayFacadeService kakaoPayService;
 
 	@AllUser
-	@Operation(summary = "결제 준비 API", description = "아이디어 식별자, 판매자 식별자, 상품 수량, 총 결제금액(vat 포함), vat를 json 본문으로 입력받아 카카오페이 쪽에 결제 정보를 생성합니다.<br>사용자를 결제 화면으로 이동시킬 수 있도록 리다이렉트 url이 응답값으로 제공됩니다.<br>해당 url로 이동하여 비밀번호 입력을 마치면 프론트 쪽 경로로 이동합니다. 이때 쿼리 파라미터로 전달되는 pgToken, ideaId, orderId를 /kakao-pay/approve에 전달하시면 됩니다.")
+	@Operation(summary = "결제 준비 API", description = "아이디어 식별자, 판매자 식별자, 상품 수량, 총 결제금액(vat 포함), vat를 json 본문으로 입력받아 카카오페이 쪽에 결제 정보를 생성합니다.<br>사용자를 결제 화면으로 이동시킬 수 있도록 리다이렉트 url과 주문 번호가 응답값으로 제공됩니다.<br>주문 번호는 이후 승인 단계에서 pgToken과 함께 전달해주시면 됩니다.")
 	@PostMapping("/ready")
 	public ResponseEntity<ApiResponse<KakaoPayReadyDto.Response>> kakaoPayReady(@UserId Long userId,
 		@RequestBody KakaoPayReadyDto.Request request) {
diff --git a/src/main/java/com/brainpix/kakaopay/converter/KakaoPayApproveDtoConverter.java b/src/main/java/com/brainpix/kakaopay/converter/KakaoPayApproveDtoConverter.java
index 9ff25967..1896f39e 100644
--- a/src/main/java/com/brainpix/kakaopay/converter/KakaoPayApproveDtoConverter.java
+++ b/src/main/java/com/brainpix/kakaopay/converter/KakaoPayApproveDtoConverter.java
@@ -15,6 +15,7 @@ public static KakaoPayApproveDto.Parameter toParameter(Long userId, KakaoPayAppr
 			.userId(userId)
 			.orderId(request.getOrderId())
 			.pgToken(request.getPgToken())
+			.ideaId(request.getIdeaId())
 			.build();
 	}
 
diff --git a/src/main/java/com/brainpix/kakaopay/converter/KakaoPayReadyDtoConverter.java b/src/main/java/com/brainpix/kakaopay/converter/KakaoPayReadyDtoConverter.java
index 4ccbbab2..c38b5a09 100644
--- a/src/main/java/com/brainpix/kakaopay/converter/KakaoPayReadyDtoConverter.java
+++ b/src/main/java/com/brainpix/kakaopay/converter/KakaoPayReadyDtoConverter.java
@@ -1,9 +1,6 @@
 package com.brainpix.kakaopay.converter;
 
 import com.brainpix.kakaopay.dto.KakaoPayReadyDto;
-import com.brainpix.kakaopay.entity.KakaoPaymentData;
-import com.brainpix.post.entity.idea_market.IdeaMarket;
-import com.brainpix.user.entity.User;
 
 public class KakaoPayReadyDtoConverter {
 
@@ -27,18 +24,4 @@ public static KakaoPayReadyDto.Response toResponse(KakaoPayReadyDto.KakaoApiResp
 			.orderId(orderId)
 			.build();
 	}
-
-	public static KakaoPaymentData toKakaoPaymentData(KakaoPayReadyDto.KakaoApiResponse kakaoApiResponse,
-		KakaoPayReadyDto.Parameter parameter,
-		String orderId, User buyer,
-		IdeaMarket ideaMarket) {
-
-		return KakaoPaymentData.builder()
-			.tid(kakaoApiResponse.getTid())
-			.quantity(parameter.getQuantity())
-			.orderId(orderId)
-			.buyer(buyer)
-			.ideaMarket(ideaMarket)
-			.build();
-	}
 }
diff --git a/src/main/java/com/brainpix/kakaopay/converter/KakaoPaymentDataDtoConverter.java b/src/main/java/com/brainpix/kakaopay/converter/KakaoPaymentDataDtoConverter.java
new file mode 100644
index 00000000..70b1a578
--- /dev/null
+++ b/src/main/java/com/brainpix/kakaopay/converter/KakaoPaymentDataDtoConverter.java
@@ -0,0 +1,15 @@
+package com.brainpix.kakaopay.converter;
+
+import com.brainpix.kakaopay.dto.KakaoPaymentDataDto;
+
+public class KakaoPaymentDataDtoConverter {
+
+	public static KakaoPaymentDataDto toKakaoPaymentDataDto(String tid, Long buyerId, Long quantity) {
+
+		return KakaoPaymentDataDto.builder()
+			.tid(tid)
+			.buyerId(buyerId)
+			.quantity(quantity)
+			.build();
+	}
+}
diff --git a/src/main/java/com/brainpix/kakaopay/dto/KakaoPaymentDataDto.java b/src/main/java/com/brainpix/kakaopay/dto/KakaoPaymentDataDto.java
new file mode 100644
index 00000000..808dde56
--- /dev/null
+++ b/src/main/java/com/brainpix/kakaopay/dto/KakaoPaymentDataDto.java
@@ -0,0 +1,13 @@
+package com.brainpix.kakaopay.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+public class KakaoPaymentDataDto {
+
+	private String tid;    // 카카오페이 쪽 주문 고유 번호
+	private Long buyerId;    // 유저 ID
+	private Long quantity;    // 구매 수량
+}
diff --git a/src/main/java/com/brainpix/kakaopay/entity/KakaoPaymentData.java b/src/main/java/com/brainpix/kakaopay/entity/KakaoPaymentData.java
deleted file mode 100644
index 56c4dcc4..00000000
--- a/src/main/java/com/brainpix/kakaopay/entity/KakaoPaymentData.java
+++ /dev/null
@@ -1,43 +0,0 @@
-package com.brainpix.kakaopay.entity;
-
-import com.brainpix.jpa.BaseTimeEntity;
-import com.brainpix.post.entity.idea_market.IdeaMarket;
-import com.brainpix.user.entity.User;
-
-import jakarta.persistence.Entity;
-import jakarta.persistence.GeneratedValue;
-import jakarta.persistence.GenerationType;
-import jakarta.persistence.Id;
-import jakarta.persistence.ManyToOne;
-import lombok.Builder;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-
-@Entity
-@Getter
-@NoArgsConstructor
-public class KakaoPaymentData extends BaseTimeEntity {
-
-	@Id
-	@GeneratedValue(strategy = GenerationType.IDENTITY)
-	private Long id;
-
-	private String orderId;
-	private String tid;
-	private Long quantity;
-
-	@ManyToOne
-	private User buyer;
-	@ManyToOne
-	private IdeaMarket ideaMarket;
-
-	@Builder
-	public KakaoPaymentData(Long id, String orderId, String tid, Long quantity, User buyer, IdeaMarket ideaMarket) {
-		this.id = id;
-		this.orderId = orderId;
-		this.tid = tid;
-		this.quantity = quantity;
-		this.buyer = buyer;
-		this.ideaMarket = ideaMarket;
-	}
-}
diff --git a/src/main/java/com/brainpix/kakaopay/repository/KakaoPaymentDataRepository.java b/src/main/java/com/brainpix/kakaopay/repository/KakaoPaymentDataRepository.java
deleted file mode 100644
index e0c060a3..00000000
--- a/src/main/java/com/brainpix/kakaopay/repository/KakaoPaymentDataRepository.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package com.brainpix.kakaopay.repository;
-
-import java.util.Optional;
-
-import org.springframework.data.jpa.repository.JpaRepository;
-
-import com.brainpix.kakaopay.entity.KakaoPaymentData;
-
-public interface KakaoPaymentDataRepository extends JpaRepository<KakaoPaymentData, Long> {
-
-	Optional<KakaoPaymentData> findByOrderId(String orderId);
-}
diff --git a/src/main/java/com/brainpix/kakaopay/repository/NamedLockRepository.java b/src/main/java/com/brainpix/kakaopay/repository/NamedLockRepository.java
deleted file mode 100644
index dc7e9f38..00000000
--- a/src/main/java/com/brainpix/kakaopay/repository/NamedLockRepository.java
+++ /dev/null
@@ -1,18 +0,0 @@
-package com.brainpix.kakaopay.repository;
-
-import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.query.Param;
-
-import com.brainpix.joining.entity.purchasing.IdeaMarketPurchasing;
-
-public interface NamedLockRepository extends JpaRepository<IdeaMarketPurchasing, Long> {
-
-	// 네임드 락 획득
-	@Query(value = "SELECT GET_LOCK(:lockName, 10)", nativeQuery = true)
-	Integer getLock(@Param("lockName") String lockName);
-
-	// 네임드 락 해제
-	@Query(value = "SELECT RELEASE_LOCK(:lockName)", nativeQuery = true)
-	Integer releaseLock(@Param("lockName") String lockName);
-}
diff --git a/src/main/java/com/brainpix/kakaopay/service/KakaoPayFacadeService.java b/src/main/java/com/brainpix/kakaopay/service/KakaoPayFacadeService.java
index 4f0de8db..b08c3028 100644
--- a/src/main/java/com/brainpix/kakaopay/service/KakaoPayFacadeService.java
+++ b/src/main/java/com/brainpix/kakaopay/service/KakaoPayFacadeService.java
@@ -1,5 +1,9 @@
 package com.brainpix.kakaopay.service;
 
+import java.util.concurrent.TimeUnit;
+
+import org.redisson.api.RLock;
+import org.redisson.api.RedissonClient;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -7,7 +11,6 @@
 import com.brainpix.api.exception.BrainPixException;
 import com.brainpix.kakaopay.dto.KakaoPayApproveDto;
 import com.brainpix.kakaopay.dto.KakaoPayReadyDto;
-import com.brainpix.kakaopay.repository.NamedLockRepository;
 
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -17,35 +20,35 @@
 @RequiredArgsConstructor
 public class KakaoPayFacadeService {
 
-	private final NamedLockRepository namedLockRepository;
 	private final KakaoPayService kakaoPayService;
+	private final RedissonClient redissonClient;
 
 	@Transactional
 	public KakaoPayReadyDto.Response kakaoPayReady(KakaoPayReadyDto.Parameter parameter) {
 		return kakaoPayService.kakaoPayReady(parameter);
 	}
 
-	@Transactional
+	// 락 획득 → 트랜잭션 시작 → 트랜잭션 해제 → 락 해제 (락 해제가 커밋 이후로 보장되어야 하므로 Facade 패턴 적용)
 	public KakaoPayApproveDto.Response kakaoPayApprove(KakaoPayApproveDto.Parameter parameter) {
-		String lockName = "LOCK_KAKAO_PAY_APPROVE_" + parameter.getIdeaId();
-		try {
-			acquireLock(lockName);
-			return kakaoPayService.kakaoPayApprove(parameter);
-		} finally {
-			releaseLock(lockName);
-		}
-	}
 
-	private void acquireLock(String lockName) {
-		log.info("락 요청 lockName : {}", lockName);
-		Integer result = namedLockRepository.getLock(lockName);
-		if (result == null || result == 0) {
+		String lockKey = "lock:idea:" + parameter.getIdeaId();
+		RLock lock = redissonClient.getLock(lockKey);
+		boolean isLocked = false;
+
+		try {
+			isLocked = lock.tryLock(5, TimeUnit.SECONDS);    // 5초동안 락 획득 대기
+			if (isLocked) {
+				log.info("결제 락 획득 성공: {}", lockKey);
+				return kakaoPayService.kakaoPayApprove(parameter);    // 승인 서비스 코드 실행
+			} else {
+				log.info("결제 락 획득 실패: {}", lockKey);
+				throw new BrainPixException(CommonErrorCode.INTERNAL_SERVER_ERROR);
+			}
+		} catch (InterruptedException e) {
 			throw new BrainPixException(CommonErrorCode.INTERNAL_SERVER_ERROR);
+		} finally {
+			lock.unlock();    // 락 해제
+			log.info("결제 락 해제 성공: {}", lockKey);
 		}
 	}
-
-	private void releaseLock(String lockName) {
-		log.info("락 반환 lockName : {}", lockName);
-		namedLockRepository.releaseLock(lockName);
-	}
 }
diff --git a/src/main/java/com/brainpix/kakaopay/service/KakaoPayService.java b/src/main/java/com/brainpix/kakaopay/service/KakaoPayService.java
index 05abca00..9a2284ca 100644
--- a/src/main/java/com/brainpix/kakaopay/service/KakaoPayService.java
+++ b/src/main/java/com/brainpix/kakaopay/service/KakaoPayService.java
@@ -4,7 +4,6 @@
 import java.util.UUID;
 
 import org.springframework.stereotype.Service;
-import org.springframework.transaction.annotation.Propagation;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.brainpix.api.code.error.CommonErrorCode;
@@ -19,12 +18,13 @@
 import com.brainpix.kakaopay.api_client.KakaoPayApiClient;
 import com.brainpix.kakaopay.converter.KakaoPayApproveDtoConverter;
 import com.brainpix.kakaopay.converter.KakaoPayReadyDtoConverter;
+import com.brainpix.kakaopay.converter.KakaoPaymentDataDtoConverter;
 import com.brainpix.kakaopay.dto.KakaoPayApproveDto;
 import com.brainpix.kakaopay.dto.KakaoPayReadyDto;
-import com.brainpix.kakaopay.entity.KakaoPaymentData;
-import com.brainpix.kakaopay.repository.KakaoPaymentDataRepository;
+import com.brainpix.kakaopay.dto.KakaoPaymentDataDto;
 import com.brainpix.post.entity.idea_market.IdeaMarket;
 import com.brainpix.post.repository.IdeaMarketRepository;
+import com.brainpix.redis.service.RedisKakaoPayCacheService;
 import com.brainpix.user.entity.User;
 import com.brainpix.user.repository.UserRepository;
 
@@ -39,9 +39,9 @@ public class KakaoPayService {
 	private final UserRepository userRepository;
 	private final IdeaMarketRepository ideaMarketRepository;
 	private final IdeaMarketPurchasingRepository ideaMarketPurchasingRepository;
-	private final KakaoPaymentDataRepository kakaoPaymentDataRepository;
 	private final AlarmEventService alarmEventService;
 	private final KakaoPayApiClient kakaoPayApiClient;
+	private final RedisKakaoPayCacheService redisKakaoPayCacheService;
 
 	@Transactional
 	public KakaoPayReadyDto.Response kakaoPayReady(KakaoPayReadyDto.Parameter parameter) {
@@ -74,34 +74,35 @@ public KakaoPayReadyDto.Response kakaoPayReady(KakaoPayReadyDto.Parameter parame
 
 		log.info("카카오페이 결제 준비 API 성공");
 
-		// 4. 결제 정보 DB에 저장
-		KakaoPaymentData kakaoPaymentData = KakaoPayReadyDtoConverter.toKakaoPaymentData(kakaoApiResponse,
-			parameter, orderId, buyer, ideaMarket);
+		// 4. 결제 정보 캐싱
+		KakaoPaymentDataDto kakaoPaymentData = KakaoPaymentDataDtoConverter.toKakaoPaymentDataDto(
+			kakaoApiResponse.getTid(), buyer.getId(),
+			parameter.getQuantity());
 
-		kakaoPaymentDataRepository.save(kakaoPaymentData);
+		redisKakaoPayCacheService.savePaymentData(orderId, kakaoPaymentData);
 
 		// 5. 최종 응답
 		return KakaoPayReadyDtoConverter.toResponse(kakaoApiResponse, orderId);
 	}
 
-	@Transactional(propagation = Propagation.REQUIRES_NEW)
+	@Transactional
 	public KakaoPayApproveDto.Response kakaoPayApprove(KakaoPayApproveDto.Parameter parameter) {
 
-		// 1. DB에서 결제 정보 조회
-		KakaoPaymentData kakaoPaymentData = kakaoPaymentDataRepository.findByOrderId(parameter.getOrderId())
-			.orElseThrow(() -> new BrainPixException(CommonErrorCode.RESOURCE_NOT_FOUND));
+		// 1. 결제 정보 조회
+		KakaoPaymentDataDto kakaoPaymentData = redisKakaoPayCacheService.getPaymentData(parameter.getOrderId())
+			.orElseThrow(() -> new BrainPixException(KakaoPayErrorCode.PAYMENT_DATA_NOT_FOUND));
 
 		// 2. 엔티티 검색
 		User user = userRepository.findById(parameter.getUserId())
 			.orElseThrow(() -> new BrainPixException(CommonErrorCode.RESOURCE_NOT_FOUND));
-		IdeaMarket ideaMarket = ideaMarketRepository.findById(kakaoPaymentData.getIdeaMarket().getId())
+		IdeaMarket ideaMarket = ideaMarketRepository.findById(parameter.getIdeaId())
 			.orElseThrow(() -> new BrainPixException(PostErrorCode.POST_NOT_FOUND));
 
 		// 3. API 호출 전 검증 로직
 		if (kakaoPaymentData.getQuantity() > ideaMarket.getPrice().getRemainingQuantity()) {
 			throw new BrainPixException(KakaoPayErrorCode.QUANTITY_INVALID);    // 주문 수량이 재고를 초과한 경우
 		}
-		if (user != kakaoPaymentData.getBuyer()) {
+		if (user.getId() != kakaoPaymentData.getBuyerId()) {
 			throw new BrainPixException(CommonErrorCode.INVALID_PARAMETER);    // API 호출자와 실 구매자가 일치하지 않는 경우
 		}
 
@@ -123,7 +124,7 @@ public KakaoPayApproveDto.Response kakaoPayApprove(KakaoPayApproveDto.Parameter
 			ideaMarket, PaymentDuration.ONCE);
 
 		ideaMarketPurchasingRepository.save(ideaMarketPurchasing);
-		kakaoPaymentDataRepository.delete(kakaoPaymentData);
+		redisKakaoPayCacheService.deletePaymentData(parameter.getOrderId());
 
 		// 8. 판매자에게 알람 생성
 		alarmEventService.publishIdeaSold(ideaMarket.getWriter().getId(), ideaMarket.getWriter().getName());
diff --git a/src/main/java/com/brainpix/post/repository/PostRepository.java b/src/main/java/com/brainpix/post/repository/PostRepository.java
index e188e701..6d910a02 100644
--- a/src/main/java/com/brainpix/post/repository/PostRepository.java
+++ b/src/main/java/com/brainpix/post/repository/PostRepository.java
@@ -15,6 +15,6 @@ public interface PostRepository extends JpaRepository<Post, Long> {
 	Page<Post> findByWriter(User writer, Pageable pageable);
 
 	@Modifying
-	@Query("update Post p set p.viewCount = p.viewCount + 1 where p.id = :id")
-	Integer increaseViewCount(@Param("id") Long postId);
+	@Query("update Post p set p.viewCount = p.viewCount + :viewCount where p.id = :id")
+	Integer updateViewCount(@Param("id") Long postId, @Param("viewCount") Long viewCount);
 }
\ No newline at end of file
diff --git a/src/main/java/com/brainpix/post/service/CollaborationHubService.java b/src/main/java/com/brainpix/post/service/CollaborationHubService.java
index 7a9f6744..4561af4f 100644
--- a/src/main/java/com/brainpix/post/service/CollaborationHubService.java
+++ b/src/main/java/com/brainpix/post/service/CollaborationHubService.java
@@ -32,8 +32,8 @@
 import com.brainpix.post.repository.CollaborationHubRepository;
 import com.brainpix.post.repository.CollaborationRecruitmentRepository;
 import com.brainpix.post.repository.IdeaMarketRepository;
-import com.brainpix.post.repository.PostRepository;
 import com.brainpix.post.repository.SavedPostRepository;
+import com.brainpix.redis.service.RedisViewCountService;
 import com.brainpix.security.authority.BrainpixAuthority;
 import com.brainpix.user.entity.User;
 import com.brainpix.user.repository.UserRepository;
@@ -55,7 +55,7 @@ public class CollaborationHubService {
 	private final IdeaMarketRepository ideaMarketRepository;
 	private final RequestTaskPurchasingRepository requestTaskPurchasingRepository;
 	private final AlarmEventService alarmEventService;
-	private final PostRepository postRepository;
+	private final RedisViewCountService redisViewCountService;
 
 	@Transactional
 	public Long createCollaborationHub(Long userId, CollaborationHubCreateDto createDto) {
@@ -115,7 +115,7 @@ public CommonPageResponse<GetCollaborationHubListDto.CollaborationDetail> getCol
 		return GetCollaborationHubListDtoConverter.toResponse(result);
 	}
 
-	@Transactional
+	@Transactional(readOnly = true)
 	public GetCollaborationHubDetailDto.Response getCollaborationHubDetail(
 		GetCollaborationHubDetailDto.Parameter parameter) {
 
@@ -134,7 +134,7 @@ public GetCollaborationHubDetailDto.Response getCollaborationHubDetail(
 		}
 
 		// 조회수 증가
-		postRepository.increaseViewCount(collaborationHub.getId());
+		redisViewCountService.increaseViewCount(collaborationHub.getId(), parameter.getUserId());
 
 		// 작성자 조회
 		User writer = collaborationHub.getWriter();
diff --git a/src/main/java/com/brainpix/post/service/IdeaMarketService.java b/src/main/java/com/brainpix/post/service/IdeaMarketService.java
index 58d1618b..b4f6b556 100644
--- a/src/main/java/com/brainpix/post/service/IdeaMarketService.java
+++ b/src/main/java/com/brainpix/post/service/IdeaMarketService.java
@@ -28,8 +28,8 @@
 import com.brainpix.post.entity.idea_market.IdeaMarket;
 import com.brainpix.post.entity.idea_market.IdeaMarketType;
 import com.brainpix.post.repository.IdeaMarketRepository;
-import com.brainpix.post.repository.PostRepository;
 import com.brainpix.post.repository.SavedPostRepository;
+import com.brainpix.redis.service.RedisViewCountService;
 import com.brainpix.security.authority.BrainpixAuthority;
 import com.brainpix.user.entity.User;
 import com.brainpix.user.repository.UserRepository;
@@ -47,7 +47,7 @@ public class IdeaMarketService {
 	private final PriceService priceService;
 	private final CreateIdeaMarketConverter createIdeaMarketConverter;
 	private final RequestTaskPurchasingRepository requestTaskPurchasingRepository;
-	private final PostRepository postRepository;
+	private final RedisViewCountService redisViewCountService;
 
 	@Transactional
 	public Long createIdeaMarket(Long userId, IdeaMarketCreateDto createDto) {
@@ -106,7 +106,7 @@ public CommonPageResponse<GetIdeaListDto.IdeaDetail> getIdeaList(GetIdeaListDto.
 	}
 
 	// 아이디어 식별자 값을 입력받아 상세보기에 관한 내용을 반환합니다.
-	@Transactional
+	@Transactional(readOnly = true)
 	public GetIdeaDetailDto.Response getIdeaDetail(GetIdeaDetailDto.Parameter parameter) {
 
 		// 유저 조회
@@ -124,7 +124,7 @@ public GetIdeaDetailDto.Response getIdeaDetail(GetIdeaDetailDto.Parameter parame
 		}
 
 		// 조회수 증가
-		postRepository.increaseViewCount(ideaMarket.getId());
+		redisViewCountService.increaseViewCount(ideaMarket.getId(), parameter.getUserId());
 
 		// 작성자 조회
 		User writer = ideaMarket.getWriter();
diff --git a/src/main/java/com/brainpix/post/service/RequestTaskQueryService.java b/src/main/java/com/brainpix/post/service/RequestTaskQueryService.java
index 1428196c..3eb37651 100644
--- a/src/main/java/com/brainpix/post/service/RequestTaskQueryService.java
+++ b/src/main/java/com/brainpix/post/service/RequestTaskQueryService.java
@@ -19,9 +19,9 @@
 import com.brainpix.post.entity.PostAuth;
 import com.brainpix.post.entity.request_task.RequestTask;
 import com.brainpix.post.repository.IdeaMarketRepository;
-import com.brainpix.post.repository.PostRepository;
 import com.brainpix.post.repository.RequestTaskRepository;
 import com.brainpix.post.repository.SavedPostRepository;
+import com.brainpix.redis.service.RedisViewCountService;
 import com.brainpix.security.authority.BrainpixAuthority;
 import com.brainpix.user.entity.User;
 import com.brainpix.user.repository.UserRepository;
@@ -38,7 +38,7 @@ public class RequestTaskQueryService {
 	private final CollectionGatheringRepository collectionGatheringRepository;
 	private final UserRepository userRepository;
 	private final RequestTaskPurchasingRepository requestTaskPurchasingRepository;
-	private final PostRepository postRepository;
+	private final RedisViewCountService redisViewCountService;
 
 	// 요청 과제 메인페이지에서 검색 조건을 적용하여 요청 과제 목록을 반환합니다.
 	@Transactional(readOnly = true)
@@ -96,7 +96,7 @@ public GetRequestTaskDetailDto.Response getRequestTaskDetail(
 		}
 
 		// 조회수 증가
-		postRepository.increaseViewCount(requestTask.getId());
+		redisViewCountService.increaseViewCount(requestTask.getId(), parameter.getUserId());
 
 		// 작성자 조회
 		User writer = requestTask.getWriter();
diff --git a/src/main/java/com/brainpix/redis/service/RedisKakaoPayCacheService.java b/src/main/java/com/brainpix/redis/service/RedisKakaoPayCacheService.java
new file mode 100644
index 00000000..fac065d2
--- /dev/null
+++ b/src/main/java/com/brainpix/redis/service/RedisKakaoPayCacheService.java
@@ -0,0 +1,38 @@
+package com.brainpix.redis.service;
+
+import java.time.Duration;
+import java.util.Optional;
+
+import org.redisson.api.RBucket;
+import org.redisson.api.RedissonClient;
+import org.springframework.stereotype.Service;
+
+import com.brainpix.kakaopay.dto.KakaoPaymentDataDto;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class RedisKakaoPayCacheService {
+
+	private final RedissonClient redissonClient;
+	private final String PAYMENT_DATA_PREFIX = "kakao:paymentData:";
+
+	// 결제 정보 캐싱
+	public void savePaymentData(String orderId, KakaoPaymentDataDto kakaoPaymentDataDto) {
+		RBucket<KakaoPaymentDataDto> bucket = redissonClient.getBucket(PAYMENT_DATA_PREFIX + orderId);
+		bucket.set(kakaoPaymentDataDto, Duration.ofMinutes(5)); // 유효 시간 5분
+	}
+
+	// 결제 정보 조회
+	public Optional<KakaoPaymentDataDto> getPaymentData(String orderId) {
+		RBucket<KakaoPaymentDataDto> bucket = redissonClient.getBucket(PAYMENT_DATA_PREFIX + orderId);
+		return Optional.ofNullable(bucket.get());
+	}
+
+	// 결제 정보 삭제
+	public void deletePaymentData(String orderId) {
+		RBucket<KakaoPaymentDataDto> bucket = redissonClient.getBucket(PAYMENT_DATA_PREFIX + orderId);
+		bucket.delete();
+	}
+}
diff --git a/src/main/java/com/brainpix/redis/service/RedisViewCountService.java b/src/main/java/com/brainpix/redis/service/RedisViewCountService.java
new file mode 100644
index 00000000..e58541ed
--- /dev/null
+++ b/src/main/java/com/brainpix/redis/service/RedisViewCountService.java
@@ -0,0 +1,48 @@
+package com.brainpix.redis.service;
+
+import java.time.Duration;
+
+import org.redisson.api.RSet;
+import org.redisson.api.RedissonClient;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import com.brainpix.post.repository.PostRepository;
+
+import lombok.RequiredArgsConstructor;
+
+@Service
+@RequiredArgsConstructor
+public class RedisViewCountService {
+
+	private final RedissonClient redissonClient;
+	private final PostRepository postRepository;
+	private final String POST_PREFIX = "post:";
+
+	// 조회수 어뷰징 방지를 위한 set 사용
+	public void increaseViewCount(Long postId, Long userId) {
+		RSet<Long> viewUsers = redissonClient.getSet(POST_PREFIX + postId);
+		viewUsers.add(userId);
+		viewUsers.expire(Duration.ofDays(1));
+	}
+
+	@Scheduled(fixedRate = 60000) // 1분마다 조회수 업데이트
+	@Transactional
+	public void increaseViewCountToDB() {
+		Iterable<String> keys = redissonClient.getKeys().getKeysByPattern(POST_PREFIX + "*");
+
+		for (String key : keys) {
+			RSet<Long> viewUsers = redissonClient.getSet(key);
+
+			Long postId = Long.parseLong(key.substring(POST_PREFIX.length()));
+			Long viewCount = (long)viewUsers.size();
+
+			// DB에 조회수 반영
+			postRepository.updateViewCount(postId, viewCount);
+
+			// 반영 후 삭제
+			viewUsers.delete();
+		}
+	}
+}