diff --git a/packages/common/infra/src/modules/workspace/entities/engine.ts b/packages/common/infra/src/modules/workspace/entities/engine.ts
index dbd4b9cb6d..d13ec6356c 100644
--- a/packages/common/infra/src/modules/workspace/entities/engine.ts
+++ b/packages/common/infra/src/modules/workspace/entities/engine.ts
@@ -3,6 +3,7 @@ import type { Doc as YDoc } from 'yjs';
 import { Entity } from '../../../framework';
 import { AwarenessEngine, BlobEngine, DocEngine } from '../../../sync';
 import { throwIfAborted } from '../../../utils';
+import { WorkspaceEngineBeforeStart } from '../events';
 import type { WorkspaceEngineProvider } from '../providers/flavour';
 import type { WorkspaceService } from '../services/workspace';
 
@@ -33,6 +34,7 @@ export class WorkspaceEngine extends Entity<{
   }
 
   start() {
+    this.eventBus.emit(WorkspaceEngineBeforeStart, this);
     this.doc.start();
     this.awareness.connect(this.workspaceService.workspace.awareness);
     this.blob.start();
diff --git a/packages/common/infra/src/modules/workspace/events/index.ts b/packages/common/infra/src/modules/workspace/events/index.ts
new file mode 100644
index 0000000000..2cd9c2f230
--- /dev/null
+++ b/packages/common/infra/src/modules/workspace/events/index.ts
@@ -0,0 +1,6 @@
+import { createEvent } from '../../../framework';
+import type { WorkspaceEngine } from '../entities/engine';
+
+export const WorkspaceEngineBeforeStart = createEvent<WorkspaceEngine>(
+  'WorkspaceEngineBeforeStart'
+);
diff --git a/packages/common/infra/src/modules/workspace/index.ts b/packages/common/infra/src/modules/workspace/index.ts
index 6ca53b3396..7487b80271 100644
--- a/packages/common/infra/src/modules/workspace/index.ts
+++ b/packages/common/infra/src/modules/workspace/index.ts
@@ -1,5 +1,6 @@
 export type { WorkspaceProfileInfo } from './entities/profile';
 export { Workspace } from './entities/workspace';
+export { WorkspaceEngineBeforeStart } from './events';
 export { globalBlockSuiteSchema } from './global-schema';
 export type { WorkspaceMetadata } from './metadata';
 export type { WorkspaceOpenOptions } from './open-options';
diff --git a/packages/common/infra/src/sync/doc/index.ts b/packages/common/infra/src/sync/doc/index.ts
index c75106c6a6..435f76d30a 100644
--- a/packages/common/infra/src/sync/doc/index.ts
+++ b/packages/common/infra/src/sync/doc/index.ts
@@ -23,6 +23,7 @@ export {
 } from './storage';
 
 export class DocEngine {
+  readonly clientId: string;
   localPart: DocEngineLocalPart;
   remotePart: DocEngineRemotePart | null;
 
@@ -80,11 +81,11 @@ export class DocEngine {
     storage: DocStorage,
     private readonly server?: DocServer | null
   ) {
-    const clientId = nanoid();
+    this.clientId = nanoid();
     this.storage = new DocStorageInner(storage);
-    this.localPart = new DocEngineLocalPart(clientId, this.storage);
+    this.localPart = new DocEngineLocalPart(this.clientId, this.storage);
     this.remotePart = this.server
-      ? new DocEngineRemotePart(clientId, this.storage, this.server)
+      ? new DocEngineRemotePart(this.clientId, this.storage, this.server)
       : null;
   }
 
diff --git a/packages/common/infra/src/sync/index.ts b/packages/common/infra/src/sync/index.ts
index f55463ee6f..9f8f3bb7e1 100644
--- a/packages/common/infra/src/sync/index.ts
+++ b/packages/common/infra/src/sync/index.ts
@@ -4,3 +4,11 @@ export type { BlobStatus, BlobStorage } from './blob/blob';
 export { BlobEngine, EmptyBlobStorage } from './blob/blob';
 export { BlobStorageOverCapacity } from './blob/error';
 export * from './doc';
+export * from './indexer';
+export {
+  IndexedDBIndex,
+  IndexedDBIndexStorage,
+} from './indexer/impl/indexeddb';
+export { MemoryIndex, MemoryIndexStorage } from './indexer/impl/memory';
+export * from './job';
+export { IndexedDBJobQueue } from './job/impl/indexeddb';
diff --git a/packages/frontend/core/src/modules/docs-search/README.md b/packages/frontend/core/src/modules/docs-search/README.md
new file mode 100644
index 0000000000..9f6a1f955e
--- /dev/null
+++ b/packages/frontend/core/src/modules/docs-search/README.md
@@ -0,0 +1,3 @@
+# docs-search
+
+This module is responsible for subscribing to updates from the doc engine and writing the doc content into the indexer, providing search and aggregation capabilities.
diff --git a/packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts b/packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts
new file mode 100644
index 0000000000..48e4189d6e
--- /dev/null
+++ b/packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts
@@ -0,0 +1,456 @@
+import { DebugLogger } from '@affine/debug';
+import type { AffineTextAttributes } from '@blocksuite/blocks';
+import type { DeltaInsert } from '@blocksuite/inline';
+import type { Job, JobQueue, WorkspaceService } from '@toeverything/infra';
+import {
+  Document,
+  Entity,
+  IndexedDBIndexStorage,
+  IndexedDBJobQueue,
+  JobRunner,
+  LiveData,
+} from '@toeverything/infra';
+import { difference } from 'lodash-es';
+import { map } from 'rxjs';
+import { Array as YArray, Map as YMap, type Text as YText } from 'yjs';
+import { applyUpdate, Doc as YDoc } from 'yjs';
+
+import {
+  type BlockIndexSchema,
+  blockIndexSchema,
+  docIndexSchema,
+} from '../schema';
+
+const logger = new DebugLogger('crawler');
+
+interface IndexerJobPayload {
+  docId: string;
+}
+
+export class DocsIndexer extends Entity {
+  private readonly jobQueue: JobQueue<IndexerJobPayload> =
+    new IndexedDBJobQueue<IndexerJobPayload>(
+      'jq:' + this.workspaceService.workspace.id
+    );
+
+  private readonly runner = new JobRunner(
+    this.jobQueue,
+    (jobs, signal) => this.execJob(jobs, signal),
+    () => new Promise<void>(resolve => requestIdleCallback(() => resolve()))
+  );
+
+  private readonly indexStorage = new IndexedDBIndexStorage(
+    'idx:' + this.workspaceService.workspace.id
+  );
+
+  readonly docIndex = this.indexStorage.getIndex('doc', docIndexSchema);
+
+  readonly blockIndex = this.indexStorage.getIndex('block', blockIndexSchema);
+
+  private readonly workspaceEngine = this.workspaceService.workspace.engine;
+
+  private readonly workspaceId = this.workspaceService.workspace.id;
+
+  readonly status$ = LiveData.from<{ remaining?: number }>(
+    this.jobQueue.status$.pipe(
+      map(status => ({
+        remaining: status.remaining,
+      }))
+    ),
+    {}
+  );
+
+  constructor(private readonly workspaceService: WorkspaceService) {
+    super();
+  }
+
+  setupListener() {
+    this.workspaceEngine.doc.storage.eventBus.on(event => {
+      if (event.clientId === this.workspaceEngine.doc.clientId) {
+        const docId = event.docId;
+
+        this.jobQueue
+          .enqueue([
+            {
+              batchKey: docId,
+              payload: { docId },
+            },
+          ])
+          .catch(err => {
+            console.error('Error enqueueing job', err);
+          });
+      }
+    });
+  }
+
+  async execJob(jobs: Job<IndexerJobPayload>[], _signal: AbortSignal) {
+    if (jobs.length === 0) {
+      return;
+    }
+
+    // jobs should have the same docId, so we just pick the first one
+    const docId = jobs[0].payload.docId;
+
+    logger.debug('Start crawling job for docId:', docId);
+
+    if (docId) {
+      if (docId === this.workspaceId) {
+        await this.crawlingRootDocData();
+      } else {
+        await this.crawlingDocData(docId);
+      }
+    }
+  }
+
+  startCrawling() {
+    this.runner.start();
+    this.jobQueue
+      .enqueue([
+        {
+          batchKey: this.workspaceId,
+          payload: { docId: this.workspaceId },
+        },
+      ])
+      .catch(err => {
+        console.error('Error enqueueing job', err);
+      });
+  }
+
+  async crawlingDocData(docId: string) {
+    const rootDocBuffer =
+      await this.workspaceEngine.doc.storage.loadDocFromLocal(this.workspaceId);
+
+    if (!rootDocBuffer) {
+      return;
+    }
+
+    const yRootDoc = new YDoc();
+    applyUpdate(yRootDoc, rootDocBuffer);
+
+    const docStoragePossibleIds = Array.from(yRootDoc.getSubdocs())
+      .map(doc => doc.guid)
+      .filter(id => id.endsWith(docId));
+
+    let docBuffer;
+
+    for (const id of docStoragePossibleIds) {
+      docBuffer = await this.workspaceEngine.doc.storage.loadDocFromLocal(id);
+
+      if (docBuffer) {
+        break;
+      }
+    }
+
+    if (!docBuffer) {
+      return;
+    }
+
+    const ydoc = new YDoc();
+
+    applyUpdate(ydoc, docBuffer);
+
+    let docExists: boolean | null = null;
+
+    (
+      yRootDoc.getMap('meta').get('pages') as YArray<YMap<any>> | undefined
+    )?.forEach(page => {
+      if (page.get('id') === docId) {
+        docExists = !(page.get('trash') ?? false);
+      }
+    });
+
+    if (!docExists) {
+      const indexWriter = await this.docIndex.write();
+      indexWriter.delete(docId);
+      await indexWriter.commit();
+
+      const blockIndexWriter = await this.blockIndex.write();
+      const oldBlocks = await blockIndexWriter.search(
+        {
+          type: 'match',
+          field: 'docId',
+          match: docId,
+        },
+        {
+          pagination: {
+            limit: Number.MAX_SAFE_INTEGER,
+          },
+        }
+      );
+      for (const block of oldBlocks.nodes) {
+        blockIndexWriter.delete(block.id);
+      }
+      await blockIndexWriter.commit();
+    } else {
+      const blocks = ydoc.getMap<any>('blocks');
+
+      if (blocks.size === 0) {
+        return;
+      }
+
+      let docTitle = '';
+
+      const blockDocuments: Document<typeof blockIndexSchema>[] = [];
+
+      for (const block of blocks.values()) {
+        const flavour = block.get('sys:flavour')?.toString();
+        const blockId = block.get('sys:id')?.toString();
+
+        if (!flavour || !blockId) {
+          continue;
+        }
+
+        if (flavour === 'affine:page') {
+          docTitle = block.get('prop:title').toString();
+          blockDocuments.push(
+            Document.from(`${docId}:${blockId}`, {
+              docId,
+              flavour,
+              blockId,
+              content: docTitle,
+            })
+          );
+        }
+
+        if (
+          flavour === 'affine:paragraph' ||
+          flavour === 'affine:list' ||
+          flavour === 'affine:code'
+        ) {
+          const text = block.get('prop:text') as YText;
+          if (!text) {
+            continue;
+          }
+
+          const deltas: DeltaInsert<AffineTextAttributes>[] = text.toDelta();
+          const ref = deltas
+            .map(delta => {
+              if (
+                delta.attributes &&
+                delta.attributes.reference &&
+                delta.attributes.reference.pageId
+              ) {
+                return delta.attributes.reference.pageId;
+              }
+              return null;
+            })
+            .filter((link): link is string => !!link);
+
+          blockDocuments.push(
+            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+              docId,
+              flavour,
+              blockId,
+              content: text.toString(),
+              ref,
+            })
+          );
+        }
+
+        if (
+          flavour === 'affine:embed-linked-doc' ||
+          flavour === 'affine:embed-synced-doc'
+        ) {
+          const pageId = block.get('prop:pageId');
+          if (typeof pageId === 'string') {
+            blockDocuments.push(
+              Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+                docId,
+                flavour,
+                blockId,
+                ref: pageId,
+              })
+            );
+          }
+        }
+
+        if (flavour === 'affine:attachment' || flavour === 'affine:image') {
+          const blobId = block.get('prop:sourceId');
+          if (typeof blobId === 'string') {
+            blockDocuments.push(
+              Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+                docId,
+                flavour,
+                blockId,
+                blob: [blobId],
+              })
+            );
+          }
+        }
+
+        if (flavour === 'affine:surface') {
+          const texts = [];
+
+          const elementsObj = block.get('prop:elements');
+          if (
+            !(
+              elementsObj instanceof YMap &&
+              elementsObj.get('type') === '$blocksuite:internal:native$'
+            )
+          ) {
+            continue;
+          }
+          const elements = elementsObj.get('value') as YMap<any>;
+          if (!(elements instanceof YMap)) {
+            continue;
+          }
+
+          for (const element of elements.values()) {
+            if (!(element instanceof YMap)) {
+              continue;
+            }
+            const text = element.get('text') as YText;
+            if (!text) {
+              continue;
+            }
+
+            texts.push(text.toString());
+          }
+
+          blockDocuments.push(
+            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+              docId,
+              flavour,
+              blockId,
+              content: texts,
+            })
+          );
+        }
+
+        if (flavour === 'affine:database') {
+          const texts = [];
+          const columnsObj = block.get('prop:columns');
+          if (!(columnsObj instanceof YArray)) {
+            continue;
+          }
+          for (const column of columnsObj) {
+            if (!(column instanceof YMap)) {
+              continue;
+            }
+            if (typeof column.get('name') === 'string') {
+              texts.push(column.get('name'));
+            }
+
+            const data = column.get('data');
+            if (!(data instanceof YMap)) {
+              continue;
+            }
+            const options = data.get('options');
+            if (!(options instanceof YArray)) {
+              continue;
+            }
+            for (const option of options) {
+              if (!(option instanceof YMap)) {
+                continue;
+              }
+              const value = option.get('value');
+              if (typeof value === 'string') {
+                texts.push(value);
+              }
+            }
+          }
+
+          blockDocuments.push(
+            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+              docId,
+              flavour,
+              blockId,
+              content: texts,
+            })
+          );
+        }
+      }
+
+      const docIndexWriter = await this.docIndex.write();
+      docIndexWriter.put(
+        Document.from<typeof docIndexSchema>(docId, {
+          title: docTitle,
+        })
+      );
+      await docIndexWriter.commit();
+
+      const blockIndexWriter = await this.blockIndex.write();
+      const oldBlocks = await blockIndexWriter.search(
+        {
+          type: 'match',
+          field: 'docId',
+          match: docId,
+        },
+        {
+          pagination: {
+            limit: Number.MAX_SAFE_INTEGER,
+          },
+        }
+      );
+      for (const block of oldBlocks.nodes) {
+        blockIndexWriter.delete(block.id);
+      }
+      for (const block of blockDocuments) {
+        blockIndexWriter.insert(block);
+      }
+      await blockIndexWriter.commit();
+    }
+  }
+
+  async crawlingRootDocData() {
+    const buffer = await this.workspaceEngine.doc.storage.loadDocFromLocal(
+      this.workspaceId
+    );
+    if (!buffer) {
+      return;
+    }
+
+    const ydoc = new YDoc();
+
+    applyUpdate(ydoc, buffer);
+
+    const docs = ydoc.getMap('meta').get('pages') as
+      | YArray<YMap<any>>
+      | undefined;
+
+    if (!docs) {
+      return;
+    }
+
+    const availableDocs = [];
+
+    for (const page of docs) {
+      const docId = page.get('id');
+
+      if (typeof docId !== 'string') {
+        continue;
+      }
+
+      const inTrash = page.get('trash') ?? false;
+
+      if (!inTrash) {
+        availableDocs.push(docId);
+      }
+    }
+
+    // a hack to get all docs in index
+    const allIndexedDocs = (
+      await this.docIndex.search(
+        {
+          type: 'all',
+        },
+        {
+          pagination: {
+            limit: Number.MAX_SAFE_INTEGER,
+            skip: 0,
+          },
+        }
+      )
+    ).nodes.map(n => n.id);
+
+    const needDelete = difference(allIndexedDocs, availableDocs);
+    const needAdd = difference(availableDocs, allIndexedDocs);
+
+    await this.jobQueue.enqueue(
+      [...needAdd, ...needDelete].map(docId => ({
+        batchKey: docId,
+        payload: { docId },
+      }))
+    );
+  }
+}
diff --git a/packages/frontend/core/src/modules/docs-search/index.ts b/packages/frontend/core/src/modules/docs-search/index.ts
new file mode 100644
index 0000000000..a202b34246
--- /dev/null
+++ b/packages/frontend/core/src/modules/docs-search/index.ts
@@ -0,0 +1,17 @@
+export { DocsSearchService } from './services/docs-search';
+
+import {
+  type Framework,
+  WorkspaceScope,
+  WorkspaceService,
+} from '@toeverything/infra';
+
+import { DocsIndexer } from './entities/docs-indexer';
+import { DocsSearchService } from './services/docs-search';
+
+export function configureDocsSearchModule(framework: Framework) {
+  framework
+    .scope(WorkspaceScope)
+    .service(DocsSearchService)
+    .entity(DocsIndexer, [WorkspaceService]);
+}
diff --git a/packages/frontend/core/src/modules/docs-search/schema.ts b/packages/frontend/core/src/modules/docs-search/schema.ts
new file mode 100644
index 0000000000..6f9e426deb
--- /dev/null
+++ b/packages/frontend/core/src/modules/docs-search/schema.ts
@@ -0,0 +1,18 @@
+import { defineSchema } from '@toeverything/infra';
+
+export const docIndexSchema = defineSchema({
+  title: 'FullText',
+});
+
+export type DocIndexSchema = typeof docIndexSchema;
+
+export const blockIndexSchema = defineSchema({
+  docId: 'String',
+  blockId: 'String',
+  content: 'FullText',
+  flavour: 'String',
+  ref: 'String',
+  blob: 'String',
+});
+
+export type BlockIndexSchema = typeof blockIndexSchema;
diff --git a/packages/frontend/core/src/modules/docs-search/services/docs-search.ts b/packages/frontend/core/src/modules/docs-search/services/docs-search.ts
new file mode 100644
index 0000000000..6c093e8b17
--- /dev/null
+++ b/packages/frontend/core/src/modules/docs-search/services/docs-search.ts
@@ -0,0 +1,123 @@
+import {
+  OnEvent,
+  Service,
+  WorkspaceEngineBeforeStart,
+} from '@toeverything/infra';
+
+import { DocsIndexer } from '../entities/docs-indexer';
+
+@OnEvent(WorkspaceEngineBeforeStart, s => s.handleWorkspaceEngineBeforeStart)
+export class DocsSearchService extends Service {
+  private readonly indexer = this.framework.createEntity(DocsIndexer);
+
+  handleWorkspaceEngineBeforeStart() {
+    this.indexer.setupListener();
+    this.indexer.startCrawling();
+  }
+
+  async search(query: string): Promise<
+    {
+      docId: string;
+      title: string;
+      score: number;
+      blockId?: string;
+      blockContent?: string;
+    }[]
+  > {
+    const { buckets } = await this.indexer.blockIndex.aggregate(
+      {
+        type: 'boolean',
+        occur: 'must',
+        queries: [
+          {
+            type: 'match',
+            field: 'content',
+            match: query,
+          },
+          {
+            type: 'boolean',
+            occur: 'should',
+            queries: [
+              {
+                type: 'all',
+              },
+              {
+                type: 'boost',
+                boost: 100,
+                query: {
+                  type: 'match',
+                  field: 'flavour',
+                  match: 'affine:page',
+                },
+              },
+            ],
+          },
+        ],
+      },
+      'docId',
+      {
+        pagination: {
+          limit: 50,
+          skip: 0,
+        },
+        hits: {
+          pagination: {
+            limit: 2,
+            skip: 0,
+          },
+          fields: ['blockId', 'flavour'],
+          highlights: [
+            {
+              field: 'content',
+              before: '<b>',
+              end: '</b>',
+            },
+          ],
+        },
+      }
+    );
+
+    const docData = await this.indexer.docIndex.getAll(
+      buckets.map(bucket => bucket.key)
+    );
+
+    const result = [];
+
+    for (const bucket of buckets) {
+      const firstMatchFlavour = bucket.hits.nodes[0]?.fields.flavour;
+      if (firstMatchFlavour === 'affine:page') {
+        // is title match
+        const blockContent = bucket.hits.nodes[1]?.highlights.content[0]; // try to get block content
+        result.push({
+          docId: bucket.key,
+          title: bucket.hits.nodes[0].highlights.content[0],
+          score: bucket.score,
+          blockContent,
+        });
+      } else {
+        const title =
+          docData.find(doc => doc.id === bucket.key)?.get('title') ?? '';
+        const matchedBlockId = bucket.hits.nodes[0]?.fields.blockId;
+        // is block match
+        result.push({
+          docId: bucket.key,
+          title: typeof title === 'string' ? title : title[0],
+          blockId:
+            typeof matchedBlockId === 'string'
+              ? matchedBlockId
+              : matchedBlockId[0],
+          score: bucket.score,
+          blockContent: bucket.hits.nodes[0]?.highlights.content[0],
+        });
+      }
+    }
+
+    return result;
+  }
+
+  async getDocTitle(docId: string) {
+    const doc = await this.indexer.docIndex.get(docId);
+    const title = doc?.get('title');
+    return typeof title === 'string' ? title : title?.[0];
+  }
+}