diff --git a/gitfolio-payment/src/main/java/com/be/gitfolio/payment/infrastructure/client/KakaoClientImpl.java b/gitfolio-payment/src/main/java/com/be/gitfolio/payment/infrastructure/client/KakaoClientImpl.java
index 8fd54bf..7bd44f0 100644
--- a/gitfolio-payment/src/main/java/com/be/gitfolio/payment/infrastructure/client/KakaoClientImpl.java
+++ b/gitfolio-payment/src/main/java/com/be/gitfolio/payment/infrastructure/client/KakaoClientImpl.java
@@ -1,14 +1,17 @@
 package com.be.gitfolio.payment.infrastructure.client;
 
 import com.be.gitfolio.payment.service.port.KakaoClient;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.http.HttpHeaders;
 import org.springframework.stereotype.Component;
 import org.springframework.web.reactive.function.client.WebClient;
+import org.springframework.web.reactive.function.client.WebClientResponseException;
 
 import java.util.Map;
 
 @Component
+@Slf4j
 public class KakaoClientImpl implements KakaoClient {
 
     private final WebClient webClient;
@@ -27,12 +30,25 @@ private HttpHeaders getHeaders(String secretKey) {
 
     @Override
     public <T> T sendKakaoPaymentRequest(String url, Map<String, ?> parameters, Class<T> responseType, String secretKey) {
-        return webClient.post()
-                .uri(url)
-                .headers(headers -> headers.addAll(getHeaders(secretKey)))
-                .bodyValue(parameters)
-                .retrieve()
-                .bodyToMono(responseType)
-                .block(); // 비동기 방식 사용 시 block() 제거 가능
+        try {
+            log.info("KakaoPay API Request - URL: {}, Parameters: {}, SecretKey: {}", url, parameters, secretKey);
+
+            return webClient.post()
+                    .uri(url)
+                    .headers(headers -> headers.addAll(getHeaders(secretKey)))
+                    .bodyValue(parameters)
+                    .retrieve()
+                    .bodyToMono(responseType)
+                    .doOnNext(resp -> log.info("KakaoPay API Response - URL: {}, Response: {}", url, resp))
+                    .block();
+        } catch (WebClientResponseException e) {
+            // HTTP 4xx, 5xx 상태 코드를 처리
+            log.error("KakaoPay API Error - URL: {}, StatusCode: {}, ResponseBody: {}", url, e.getStatusCode(), e.getResponseBodyAsString(), e);
+            throw e;
+        } catch (Exception e) {
+            // 기타 예외 처리
+            log.error("KakaoPay API Unknown Error - URL: {}, Parameters: {}", url, parameters, e);
+            throw e;
+        }
     }
 }