diff --git a/src/main/java/com/swyp/picke/domain/reward/controller/AdMobRewardController.java b/src/main/java/com/swyp/picke/domain/reward/controller/AdMobRewardController.java
index 88bb50e0..821eeddf 100644
--- a/src/main/java/com/swyp/picke/domain/reward/controller/AdMobRewardController.java
+++ b/src/main/java/com/swyp/picke/domain/reward/controller/AdMobRewardController.java
@@ -31,10 +31,18 @@ public ApiResponse<AdMobRewardResponse> handleAdMobReward(
             AdMobRewardRequest request) {
         log.info("AdMob SSV 콜백 수신: transaction_id={}", request.transaction_id());
 
-        // 서비스에서 "OK" 또는 "Already Processed" 수신
-        String status = rewardService.processReward(request);
+        // AdMob SSV 스펙: 검증 실패 포함 모든 경우에 200 반환 (비정상 응답 시 구글이 재시도)
+        if (request.transaction_id() == null || request.signature() == null || request.key_id() == null) {
+            log.info("AdMob URL 검증 요청 수신 - 200 반환");
+            return ApiResponse.onSuccess(AdMobRewardResponse.from("OK"));
+        }
 
-        // DTO로 감싸서 반환 (명세서의 data { "reward_status": "..." } 구조 완성)
-        return ApiResponse.onSuccess(AdMobRewardResponse.from(status));
+        try {
+            String status = rewardService.processReward(request);
+            return ApiResponse.onSuccess(AdMobRewardResponse.from(status));
+        } catch (Exception e) {
+            log.warn("[AdMob] 처리 실패 - 보상 미지급 후 200 반환: transaction_id={}, reason={}", request.transaction_id(), e.getMessage());
+            return ApiResponse.onSuccess(AdMobRewardResponse.from("OK"));
+        }
     }
 }
diff --git a/src/main/java/com/swyp/picke/domain/reward/dto/request/AdMobRewardRequest.java b/src/main/java/com/swyp/picke/domain/reward/dto/request/AdMobRewardRequest.java
index af4b8716..7de12be0 100644
--- a/src/main/java/com/swyp/picke/domain/reward/dto/request/AdMobRewardRequest.java
+++ b/src/main/java/com/swyp/picke/domain/reward/dto/request/AdMobRewardRequest.java
@@ -23,14 +23,14 @@ public record AdMobRewardRequest(
 ) {
     public AdMobRewardRequest(
             @RequestParam(value = "ad_network", required = false) String ad_network,
-            @RequestParam("ad_unit") String ad_unit,
+            @RequestParam(value = "ad_unit", required = false) String ad_unit,
             @RequestParam(value = "custom_data", required = false) String custom_data,
-            @RequestParam("reward_amount") int reward_amount,
-            @RequestParam("reward_item") String reward_item,
-            @RequestParam("timestamp") long timestamp,
-            @RequestParam("transaction_id") String transaction_id,
-            @RequestParam("signature") String signature,
-            @RequestParam("key_id") String key_id,
+            @RequestParam(value = "reward_amount", required = false, defaultValue = "0") int reward_amount,
+            @RequestParam(value = "reward_item", required = false) String reward_item,
+            @RequestParam(value = "timestamp", required = false, defaultValue = "0") long timestamp,
+            @RequestParam(value = "transaction_id", required = false) String transaction_id,
+            @RequestParam(value = "signature", required = false) String signature,
+            @RequestParam(value = "key_id", required = false) String key_id,
             @RequestParam(value = "user_id", required = false) String user_id
     ) {
         this.ad_network = ad_network;
diff --git a/src/main/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceImpl.java b/src/main/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceImpl.java
index b77bb946..bbb0f93d 100644
--- a/src/main/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceImpl.java
+++ b/src/main/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceImpl.java
@@ -7,9 +7,10 @@
 import com.swyp.picke.domain.user.entity.User;
 import com.swyp.picke.domain.user.enums.CreditType;
 import com.swyp.picke.domain.user.service.CreditService;
-import com.swyp.picke.domain.user.service.UserService; // // 1. UserService 임포트
+import com.swyp.picke.domain.user.service.UserService;
 import com.swyp.picke.global.common.exception.CustomException;
 import com.swyp.picke.global.common.exception.ErrorCode;
+import com.swyp.picke.global.config.AdMobConfig;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
@@ -24,8 +25,9 @@ public class AdMobRewardServiceImpl implements AdMobRewardService {
 
     private final RewardedAdsVerifier rewardedAdsVerifier;
     private final AdRewardHistoryRepository adRewardHistoryRepository;
-    private final UserService userService; // // 2. UserRepository 대신 UserService 사용 (태그 조회 로직 집중)
+    private final UserService userService;
     private final CreditService creditService;
+    private final AdMobConfig adMobConfig;
 
     @Override
     @Transactional
@@ -33,24 +35,30 @@ public String processReward(AdMobRewardRequest request) {
         log.info("[AdMob] SSV 처리 시작: transaction_id={}, userTag={}, reward_amount={}, ad_unit={}",
                 request.transaction_id(), request.getUserTag(), request.reward_amount(), request.ad_unit());
 
-        // 1. 서명 검증 (공식 파라미터 기반)
-        /*if (!verifyAdMobSignature(request)) {
+        // 1. ad_unit 유효성 검사
+        if (!adMobConfig.getAllowedUnitIds().contains(request.ad_unit())) {
+            log.warn("[AdMob] 허용되지 않은 ad_unit: {}", request.ad_unit());
+            return "OK";
+        }
+
+        // 2. 서명 검증 (공식 파라미터 기반)
+        if (!verifyAdMobSignature(request)) {
             log.warn("[AdMob] 서명 검증 실패: transaction_id={}", request.transaction_id());
-            throw new CustomException(ErrorCode.REWARD_INVALID_SIGNATURE);
-        }*/
+            return "OK";
+        }
 
-        // 2. 중복 처리 방지
+        // 3. 중복 처리 방지
         if (adRewardHistoryRepository.existsByTransactionId(request.transaction_id())) {
             log.info("[AdMob] 이미 처리된 요청: transaction_id={}", request.transaction_id());
             return "Already Processed";
         }
 
-        // 3. 유저 확인 (custom_data → user_id 순으로 조회)
+        // 4. 유저 확인 (custom_data → user_id 순으로 조회)
         log.info("[AdMob] 유저 조회 시도: userTag={}", request.getUserTag());
         User user = userService.findByUserTag(request.getUserTag());
         log.info("[AdMob] 유저 확인 완료: userId={}", user.getId());
 
-        // 4. 보상 이력 저장 후 즉시 id 확보 (saveAndFlush)
+        // 5. 보상 이력 저장 후 즉시 id 확보 (saveAndFlush)
         AdRewardHistory history = AdRewardHistory.builder()
                 .transactionId(request.transaction_id())
                 .user(user)
@@ -60,7 +68,7 @@ public String processReward(AdMobRewardRequest request) {
         adRewardHistoryRepository.saveAndFlush(history);
         log.info("[AdMob] 보상 이력 저장 완료: historyId={}", history.getId());
 
-        // 5. 크레딧 적립 (history.getId()를 referenceId로 사용해 unique 충돌 방지)
+        // 6. 크레딧 적립 (history.getId()를 referenceId로 사용해 unique 충돌 방지)
         creditService.addCredit(user.getId(), CreditType.FREE_CHARGE, request.reward_amount(), history.getId());
         log.info("[AdMob] 포인트 적립 완료: userId={}, amount={}, historyId={}",
                 user.getId(), request.reward_amount(), history.getId());
diff --git a/src/main/java/com/swyp/picke/global/config/AdMobConfig.java b/src/main/java/com/swyp/picke/global/config/AdMobConfig.java
index 59f0d842..cbcb2225 100644
--- a/src/main/java/com/swyp/picke/global/config/AdMobConfig.java
+++ b/src/main/java/com/swyp/picke/global/config/AdMobConfig.java
@@ -1,12 +1,27 @@
 package com.swyp.picke.global.config;
 
 import com.google.crypto.tink.apps.rewardedads.RewardedAdsVerifier;
+import lombok.Getter;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
+import java.util.List;
+
+@Getter
 @Configuration
 public class AdMobConfig {
 
+    @Value("${admob.reward.unit-id.ios}")
+    private String iosRewardUnitId;
+
+    @Value("${admob.reward.unit-id.android}")
+    private String androidRewardUnitId;
+
+    public List<String> getAllowedUnitIds() {
+        return List.of(iosRewardUnitId, androidRewardUnitId);
+    }
+
     @Bean
     public RewardedAdsVerifier rewardedAdsVerifier() {
         try {
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 447d5f29..e2671442 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -76,7 +76,9 @@ oauth:
 admob:
   app-id: ${ADMOB_APP_ID}
   reward:
-    unit-id: ${ADMOB_REWARD_UNIT_ID}
+    unit-id:
+      ios: ${ADMOB_REWARD_UNIT_ID_IOS}
+      android: ${ADMOB_REWARD_UNIT_ID_ANDROID}
 
 openai:
   api-key: ${OPENAI_API_KEY}
diff --git a/src/test/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceTest.java b/src/test/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceTest.java
index b0d7faa3..016a5024 100644
--- a/src/test/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceTest.java
+++ b/src/test/java/com/swyp/picke/domain/reward/service/AdMobRewardServiceTest.java
@@ -18,6 +18,7 @@
 import com.swyp.picke.domain.user.enums.UserStatus;
 import com.swyp.picke.domain.user.service.CreditService;
 import com.swyp.picke.domain.user.service.UserService;
+import com.swyp.picke.global.config.AdMobConfig;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -26,6 +27,11 @@
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.springframework.test.util.ReflectionTestUtils;
 
+import java.util.List;
+
+import static org.mockito.BDDMockito.willDoNothing;
+import static org.mockito.Mockito.doAnswer;
+
 @ExtendWith(MockitoExtension.class)
 class AdMobRewardServiceTest {
 
@@ -44,6 +50,9 @@ class AdMobRewardServiceTest {
     @Mock
     private CreditService creditService;
 
+    @Mock
+    private AdMobConfig adMobConfig;
+
     @Test
     @DisplayName("// 1. 정상적인 광고 시청 시 보상 이력이 저장되고 크레딧이 적립된다.")
     void processReward_Success() throws Exception {
@@ -58,6 +67,19 @@ void processReward_Success() throws Exception {
                 .build();
         ReflectionTestUtils.setField(mockUser, "id", 1L);
 
+        // ad_unit 허용 목록 Mock
+        given(adMobConfig.getAllowedUnitIds()).willReturn(List.of("ca-app-pub-3940256099942544/5224354917"));
+
+        // 서명 검증 Mock (검증 통과)
+        willDoNothing().given(rewardedAdsVerifier).verify(org.mockito.ArgumentMatchers.anyString());
+
+        // saveAndFlush 시 ID 세팅 Mock
+        doAnswer(invocation -> {
+            AdRewardHistory history = invocation.getArgument(0);
+            ReflectionTestUtils.setField(history, "id", 1L);
+            return history;
+        }).when(adRewardHistoryRepository).saveAndFlush(any(AdRewardHistory.class));
+
         // // 1. 중복 체크 Mock
         given(adRewardHistoryRepository.existsByTransactionId(request.transaction_id())).willReturn(false);
 
@@ -76,7 +98,7 @@ void processReward_Success() throws Exception {
 
         // // 4. 호출 검증
         verify(creditService, times(1)).addCredit(eq(1L), eq(CreditType.FREE_CHARGE), eq(100), anyLong());
-        verify(adRewardHistoryRepository, times(1)).save(any(AdRewardHistory.class));
+        verify(adRewardHistoryRepository, times(1)).saveAndFlush(any(AdRewardHistory.class));
         verify(userService, times(1)).findByUserTag("pique-1cc4a030");
     }