diff --git a/src/main/java/com/devpick/domain/content/repository/AiSummaryRepository.java b/src/main/java/com/devpick/domain/content/repository/AiSummaryRepository.java
index f73cef9..54fb65d 100644
--- a/src/main/java/com/devpick/domain/content/repository/AiSummaryRepository.java
+++ b/src/main/java/com/devpick/domain/content/repository/AiSummaryRepository.java
@@ -6,17 +6,25 @@
 import software.amazon.awssdk.enhanced.dynamodb.DynamoDbTable;
 import software.amazon.awssdk.enhanced.dynamodb.Key;
 import software.amazon.awssdk.enhanced.dynamodb.TableSchema;
+import software.amazon.awssdk.enhanced.dynamodb.model.BatchGetItemEnhancedRequest;
+import software.amazon.awssdk.enhanced.dynamodb.model.ReadBatch;
 
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 import java.util.Optional;
+import java.util.UUID;
 
 @Repository
 public class AiSummaryRepository {
 
     private static final String TABLE_NAME = "ai_summaries";
 
+    private final DynamoDbEnhancedClient enhancedClient;
     private final DynamoDbTable<AiSummaryDocument> table;
 
     public AiSummaryRepository(DynamoDbEnhancedClient enhancedClient) {
+        this.enhancedClient = enhancedClient;
         this.table = enhancedClient.table(TABLE_NAME, TableSchema.fromBean(AiSummaryDocument.class));
     }
 
@@ -27,4 +35,24 @@ public Optional<AiSummaryDocument> findByContentIdAndLevel(String contentId, Str
                 .build();
         return Optional.ofNullable(table.getItem(key));
     }
+
+    /** contentId 목록에 대해 지정 level의 coreSummary를 일괄 조회한다. */
+    public Map<UUID, String> batchFindCoreSummaries(List<String> contentIds, String level) {
+        if (contentIds.isEmpty()) return Map.of();
+
+        ReadBatch.Builder<AiSummaryDocument> batchBuilder = ReadBatch.builder(AiSummaryDocument.class)
+                .mappedTableResource(table);
+        contentIds.forEach(id -> batchBuilder.addGetItem(
+                Key.builder().partitionValue(id).sortValue(level).build()));
+
+        Map<UUID, String> result = new HashMap<>();
+        enhancedClient.batchGetItem(
+                BatchGetItemEnhancedRequest.builder().readBatches(batchBuilder.build()).build()
+        ).resultsForTable(table).forEach(doc -> {
+            if (doc.getCoreSummary() != null) {
+                result.put(UUID.fromString(doc.getContentId()), doc.getCoreSummary());
+            }
+        });
+        return result;
+    }
 }
diff --git a/src/main/java/com/devpick/domain/content/service/AiSummaryService.java b/src/main/java/com/devpick/domain/content/service/AiSummaryService.java
index 6411d9c..fdd2242 100644
--- a/src/main/java/com/devpick/domain/content/service/AiSummaryService.java
+++ b/src/main/java/com/devpick/domain/content/service/AiSummaryService.java
@@ -69,7 +69,7 @@ public AiSummaryResponse getSummary(UUID userId, UUID contentId, String level) {
      * 백엔드 level 값을 AI 서버 DynamoDB SK로 정규화한다.
      * BEGINNER→beginner, JUNIOR→junior, MIDDLE→mid, SENIOR→senior
      */
-    static String toAiServerLevel(String level) {
+    public static String toAiServerLevel(String level) {
         return switch (level.toUpperCase()) {
             case "MIDDLE" -> "mid";
             default -> level.toLowerCase();
diff --git a/src/main/java/com/devpick/domain/report/dto/HistoryItemResponse.java b/src/main/java/com/devpick/domain/report/dto/HistoryItemResponse.java
index 1950c04..d58e6a3 100644
--- a/src/main/java/com/devpick/domain/report/dto/HistoryItemResponse.java
+++ b/src/main/java/com/devpick/domain/report/dto/HistoryItemResponse.java
@@ -6,6 +6,7 @@
 
 import java.time.Instant;
 import java.time.ZoneOffset;
+import java.util.Map;
 import java.util.UUID;
 
 public record HistoryItemResponse(
@@ -24,12 +25,16 @@ public record AnswerInfo(UUID id, String preview) {}
     public record CommentInfo(UUID id, String preview) {}
 
     public static HistoryItemResponse of(History history) {
-        ContentInfo contentInfo = history.getContent() != null
-                ? new ContentInfo(
-                        history.getContent().getId(),
-                        history.getContent().getTitle(),
-                        history.getContent().getPreview())
-                : null;
+        return of(history, Map.of());
+    }
+
+    public static HistoryItemResponse of(History history, Map<UUID, String> summaryMap) {
+        ContentInfo contentInfo = null;
+        if (history.getContent() != null) {
+            UUID contentId = history.getContent().getId();
+            String preview = summaryMap.getOrDefault(contentId, history.getContent().getPreview());
+            contentInfo = new ContentInfo(contentId, history.getContent().getTitle(), preview);
+        }
 
         PostInfo postInfo = history.getPost() != null
                 ? new PostInfo(
diff --git a/src/main/java/com/devpick/domain/report/service/HistoryService.java b/src/main/java/com/devpick/domain/report/service/HistoryService.java
index cf96b9d..3271d1d 100644
--- a/src/main/java/com/devpick/domain/report/service/HistoryService.java
+++ b/src/main/java/com/devpick/domain/report/service/HistoryService.java
@@ -1,15 +1,19 @@
 package com.devpick.domain.report.service;
 
+import com.devpick.domain.content.repository.AiSummaryRepository;
+import com.devpick.domain.content.service.AiSummaryService;
 import com.devpick.domain.report.dto.ActivityItemResponse;
 import com.devpick.domain.report.dto.ActivityPageResponse;
 import com.devpick.domain.report.dto.HistoryItemResponse;
 import com.devpick.domain.report.dto.HistoryPageResponse;
 import com.devpick.domain.report.entity.History;
 import com.devpick.domain.report.repository.HistoryRepository;
+import com.devpick.domain.user.entity.User;
 import com.devpick.domain.user.repository.UserRepository;
 import com.devpick.global.common.exception.DevpickException;
 import com.devpick.global.common.exception.ErrorCode;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.stereotype.Service;
@@ -19,20 +23,23 @@
 import java.time.OffsetDateTime;
 import java.time.ZoneOffset;
 import java.util.List;
+import java.util.Map;
 import java.util.UUID;
 
+@Slf4j
 @Service
 @RequiredArgsConstructor
 public class HistoryService {
 
     private final HistoryRepository historyRepository;
     private final UserRepository userRepository;
+    private final AiSummaryRepository aiSummaryRepository;
 
     // DP-248/DP-293: 히스토리 조회 - 2단계 쿼리로 FETCH JOIN + 페이징 메모리 이슈 해결
     @Transactional(readOnly = true)
     public HistoryPageResponse getHistory(UUID userId, List<String> actionTypes,
             OffsetDateTime startDate, OffsetDateTime endDate, Pageable pageable) {
-        userRepository.findByIdAndIsActiveTrue(userId)
+        User user = userRepository.findByIdAndIsActiveTrue(userId)
                 .orElseThrow(() -> new DevpickException(ErrorCode.USER_NOT_FOUND));
 
         LocalDateTime start = startDate != null
@@ -64,8 +71,9 @@ public HistoryPageResponse getHistory(UUID userId, List<String> actionTypes,
         // 2단계: 페이지 크기(최대 100개)만큼만 FETCH JOIN으로 연관 엔티티 로딩
         List<History> histories = historyRepository.findHistoriesWithAssociationsByIds(idPage.getContent());
 
+        Map<UUID, String> summaryMap = buildSummaryMap(histories, user.getLevel().name());
         List<HistoryItemResponse> items = histories.stream()
-                .map(HistoryItemResponse::of)
+                .map(h -> HistoryItemResponse.of(h, summaryMap))
                 .toList();
 
         return new HistoryPageResponse(
@@ -80,7 +88,7 @@ public HistoryPageResponse getHistory(UUID userId, List<String> actionTypes,
     /** 전체 활동 (content_liked 포함) — {@code GET /history/activity} */
     @Transactional(readOnly = true)
     public ActivityPageResponse getActivityHistory(UUID userId, Pageable pageable) {
-        userRepository.findByIdAndIsActiveTrue(userId)
+        User user = userRepository.findByIdAndIsActiveTrue(userId)
                 .orElseThrow(() -> new DevpickException(ErrorCode.USER_NOT_FOUND));
 
         Page<UUID> idPage = historyRepository.findAllHistoryIds(userId, pageable);
@@ -90,8 +98,9 @@ public ActivityPageResponse getActivityHistory(UUID userId, Pageable pageable) {
         }
 
         List<History> histories = historyRepository.findHistoriesWithAssociationsByIds(idPage.getContent());
+        Map<UUID, String> summaryMap = buildSummaryMap(histories, user.getLevel().name());
         List<ActivityItemResponse> items = histories.stream()
-                .map(h -> ActivityItemResponse.from(HistoryItemResponse.of(h)))
+                .map(h -> ActivityItemResponse.from(HistoryItemResponse.of(h, summaryMap)))
                 .toList();
 
         return new ActivityPageResponse(
@@ -102,4 +111,22 @@ public ActivityPageResponse getActivityHistory(UUID userId, Pageable pageable) {
                 idPage.getTotalPages()
         );
     }
+
+    private Map<UUID, String> buildSummaryMap(List<History> histories, String userLevel) {
+        List<String> contentIds = histories.stream()
+                .filter(h -> h.getContent() != null)
+                .map(h -> h.getContent().getId().toString())
+                .distinct()
+                .toList();
+
+        if (contentIds.isEmpty()) return Map.of();
+
+        try {
+            String aiLevel = AiSummaryService.toAiServerLevel(userLevel);
+            return aiSummaryRepository.batchFindCoreSummaries(contentIds, aiLevel);
+        } catch (Exception e) {
+            log.warn("AI 요약 배치 조회 실패 — 원문 미리보기로 fallback: {}", e.getMessage());
+            return Map.of();
+        }
+    }
 }
diff --git a/src/test/java/com/devpick/domain/report/service/HistoryServiceTest.java b/src/test/java/com/devpick/domain/report/service/HistoryServiceTest.java
index 3c8f975..836b512 100644
--- a/src/test/java/com/devpick/domain/report/service/HistoryServiceTest.java
+++ b/src/test/java/com/devpick/domain/report/service/HistoryServiceTest.java
@@ -3,10 +3,13 @@
 import com.devpick.domain.community.entity.Answer;
 import com.devpick.domain.community.entity.Post;
 import com.devpick.domain.content.entity.Content;
+import com.devpick.domain.content.repository.AiSummaryRepository;
 import com.devpick.domain.report.dto.ActivityPageResponse;
 import com.devpick.domain.report.dto.HistoryPageResponse;
 import com.devpick.domain.report.entity.History;
 import com.devpick.domain.report.repository.HistoryRepository;
+import com.devpick.domain.user.entity.Job;
+import com.devpick.domain.user.entity.Level;
 import com.devpick.domain.user.entity.User;
 import com.devpick.domain.user.repository.UserRepository;
 import com.devpick.global.common.exception.DevpickException;
@@ -30,6 +33,7 @@
 
 import java.time.OffsetDateTime;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 import java.util.UUID;
 import java.util.stream.Stream;
@@ -37,8 +41,11 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyList;
+import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.lenient;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
@@ -52,6 +59,9 @@ class HistoryServiceTest {
     @Mock
     private UserRepository userRepository;
 
+    @Mock
+    private AiSummaryRepository aiSummaryRepository;
+
     @InjectMocks
     private HistoryService historyService;
 
@@ -62,9 +72,12 @@ class HistoryServiceTest {
     @BeforeEach
     void setUp() {
         userId = UUID.randomUUID();
-        user = User.builder().email("test@devpick.kr").nickname("하영").build();
+        user = User.builder().email("test@devpick.kr").nickname("하영")
+                .job(Job.BACKEND).level(Level.JUNIOR).build();
         ReflectionTestUtils.setField(user, "id", userId);
         pageable = PageRequest.of(0, 20, Sort.by(Sort.Direction.DESC, "createdAt"));
+        lenient().when(aiSummaryRepository.batchFindCoreSummaries(anyList(), anyString()))
+                .thenReturn(Map.of());
     }
 
     // ============================================================
@@ -296,6 +309,95 @@ void getLearningHistory_withActionTypesAndDateRange_usesActionTypesDateRangeQuer
         verify(historyRepository, never()).findHistoryIdsByActionTypes(any(), any(), any());
     }
 
+    // ============================================================
+    // content preview — AI 요약 매핑 (DP-370)
+    // ============================================================
+
+    @Test
+    @DisplayName("콘텐츠 미리보기 - AI 요약 있으면 coreSummary로 반환")
+    void getLearningHistory_contentWithSummary_returnsCoreSummary() {
+        Content content = mock(Content.class);
+        UUID contentId = UUID.randomUUID();
+        given(content.getId()).willReturn(contentId);
+        given(content.getTitle()).willReturn("Spring Security");
+        given(content.getPreview()).willReturn("원문 미리보기");
+
+        History history = History.builder()
+                .user(user).actionType("content_opened").content(content).build();
+        UUID historyId = UUID.randomUUID();
+        ReflectionTestUtils.setField(history, "id", historyId);
+
+        Page<UUID> idPage = new PageImpl<>(List.of(historyId), pageable, 1);
+        given(userRepository.findByIdAndIsActiveTrue(userId)).willReturn(Optional.of(user));
+        given(historyRepository.findHistoryIdsExcludingContentLiked(eq(userId), any(Pageable.class)))
+                .willReturn(idPage);
+        given(historyRepository.findHistoriesWithAssociationsByIds(List.of(historyId)))
+                .willReturn(List.of(history));
+        given(aiSummaryRepository.batchFindCoreSummaries(anyList(), anyString()))
+                .willReturn(Map.of(contentId, "Spring Security는 인증/인가 프레임워크입니다."));
+
+        HistoryPageResponse response = historyService.getHistory(userId, null, null, null, pageable);
+
+        assertThat(response.items().get(0).content().preview())
+                .isEqualTo("Spring Security는 인증/인가 프레임워크입니다.");
+    }
+
+    @Test
+    @DisplayName("콘텐츠 미리보기 - AI 요약 없으면 원문 preview fallback")
+    void getLearningHistory_contentWithoutSummary_fallsBackToPreview() {
+        Content content = mock(Content.class);
+        UUID contentId = UUID.randomUUID();
+        given(content.getId()).willReturn(contentId);
+        given(content.getTitle()).willReturn("JPA 기초");
+        given(content.getPreview()).willReturn("원문 미리보기 텍스트");
+
+        History history = History.builder()
+                .user(user).actionType("content_opened").content(content).build();
+        UUID historyId = UUID.randomUUID();
+        ReflectionTestUtils.setField(history, "id", historyId);
+
+        Page<UUID> idPage = new PageImpl<>(List.of(historyId), pageable, 1);
+        given(userRepository.findByIdAndIsActiveTrue(userId)).willReturn(Optional.of(user));
+        given(historyRepository.findHistoryIdsExcludingContentLiked(eq(userId), any(Pageable.class)))
+                .willReturn(idPage);
+        given(historyRepository.findHistoriesWithAssociationsByIds(List.of(historyId)))
+                .willReturn(List.of(history));
+        given(aiSummaryRepository.batchFindCoreSummaries(anyList(), anyString()))
+                .willReturn(Map.of()); // 요약 없음
+
+        HistoryPageResponse response = historyService.getHistory(userId, null, null, null, pageable);
+
+        assertThat(response.items().get(0).content().preview()).isEqualTo("원문 미리보기 텍스트");
+    }
+
+    @Test
+    @DisplayName("콘텐츠 미리보기 - DynamoDB 조회 실패 시 원문 preview fallback")
+    void getLearningHistory_summaryFetchFails_fallsBackToPreview() {
+        Content content = mock(Content.class);
+        UUID contentId = UUID.randomUUID();
+        given(content.getId()).willReturn(contentId);
+        given(content.getTitle()).willReturn("Redis 캐시");
+        given(content.getPreview()).willReturn("Redis 관련 원문");
+
+        History history = History.builder()
+                .user(user).actionType("content_opened").content(content).build();
+        UUID historyId = UUID.randomUUID();
+        ReflectionTestUtils.setField(history, "id", historyId);
+
+        Page<UUID> idPage = new PageImpl<>(List.of(historyId), pageable, 1);
+        given(userRepository.findByIdAndIsActiveTrue(userId)).willReturn(Optional.of(user));
+        given(historyRepository.findHistoryIdsExcludingContentLiked(eq(userId), any(Pageable.class)))
+                .willReturn(idPage);
+        given(historyRepository.findHistoriesWithAssociationsByIds(List.of(historyId)))
+                .willReturn(List.of(history));
+        given(aiSummaryRepository.batchFindCoreSummaries(anyList(), anyString()))
+                .willThrow(new RuntimeException("DynamoDB 연결 실패"));
+
+        HistoryPageResponse response = historyService.getHistory(userId, null, null, null, pageable);
+
+        assertThat(response.items().get(0).content().preview()).isEqualTo("Redis 관련 원문");
+    }
+
     // ============================================================
     // answer preview — markdown stripping (DP-368)
     // ============================================================