diff --git a/web/src/components/assets/asset-library-picker-modal.tsx b/web/src/components/assets/asset-library-picker-modal.tsx
index 13a324baa..acde4eff2 100644
--- a/web/src/components/assets/asset-library-picker-modal.tsx
+++ b/web/src/components/assets/asset-library-picker-modal.tsx
@@ -14,12 +14,20 @@ import type { ExternalAssetPickerReference } from "@/lib/plugins/plugin-types";
 import { flushAssetStorePersistence, useAssetStore, type Asset } from "@/stores/use-asset-store";
 import { deleteAssetWithRemoteSync, loadAssetLibraryPage, saveRemoteUserDataNow } from "@/services/user-data-sync";
 
+export type AssetPickerMediaKind = "image" | "video" | "audio" | "text";
+
+export const ASSET_PICKER_MEDIA_KIND_LABELS: Record<AssetPickerMediaKind, string> = { image: "图片", video: "视频", audio: "音频", text: "文本" };
+
+const DEFAULT_MEDIA_KINDS: AssetPickerMediaKind[] = ["image", "video", "audio"];
+
 export type AssetLibraryPickerItem = {
     id: string;
     title: string;
     category: string;
     archived?: boolean;
     kindLabel: string;
+    /** 媒体类型筛选依据；缺省时按本地素材或插件素材的 kind 推断。 */
+    mediaKind?: AssetPickerMediaKind;
     asset?: Asset;
     imageUrl?: string;
     imageStorageKey?: string;
@@ -40,6 +48,8 @@ export type AssetLibraryPickerFolder = {
 type Props = {
     remoteLibrary?: boolean;
     remoteKind?: string;
+    /** 左侧「媒体类型」筛选项；只有一种类型或已由 remoteKind 固定时不展示该分组。 */
+    mediaKinds?: AssetPickerMediaKind[];
     open: boolean;
     items: AssetLibraryPickerItem[];
     categoryLabels: Record<string, string>;
@@ -76,6 +86,7 @@ type Props = {
 export function AssetLibraryPickerModal({
     remoteLibrary = false,
     remoteKind,
+    mediaKinds = DEFAULT_MEDIA_KINDS,
     open,
     items,
     categoryLabels,
@@ -101,6 +112,7 @@ export function AssetLibraryPickerModal({
 }: Props) {
     const { message } = App.useApp();
     const [category, setCategory] = useState(initialCategory);
+    const [mediaKind, setMediaKind] = useState<AssetPickerMediaKind | "all">("all");
     const [folderId, setFolderId] = useState(initialFolderId);
     const [source, setSource] = useState<"local" | "plugin">("local");
     const [sourceMenuOpen, setSourceMenuOpen] = useState(false);
@@ -120,10 +132,12 @@ export function AssetLibraryPickerModal({
         const timer = window.setTimeout(() => setRemoteKeyword(keyword.trim()), 250);
         return () => window.clearTimeout(timer);
     }, [keyword]);
-    useEffect(() => setRemotePage(1), [category, remoteKeyword, open]);
+    useEffect(() => setRemotePage(1), [category, mediaKind, remoteKeyword, open]);
+    // remoteKind 是调用方写死的能力约束；媒体类型筛选只在没有该约束时参与服务端查询。
+    const remoteQueryKind = remoteKind || (mediaKind === "all" ? undefined : mediaKind);
     const remoteQuery = useQuery({
-        queryKey: ["asset-picker", userId, remotePage, remotePageSize, category, remoteKeyword, remoteKind],
-        queryFn: ({ signal }) => loadAssetLibraryPage({ page: remotePage, pageSize: remotePageSize, kind: remoteKind, category: category === "all" || category === "archived" || category === remoteKind ? undefined : category, status: category === "archived" ? "archived" : "active", query: remoteKeyword, signal }),
+        queryKey: ["asset-picker", userId, remotePage, remotePageSize, category, remoteKeyword, remoteQueryKind],
+        queryFn: ({ signal }) => loadAssetLibraryPage({ page: remotePage, pageSize: remotePageSize, kind: remoteQueryKind, category: category === "all" || category === "archived" || category === remoteQueryKind ? undefined : category, status: category === "archived" ? "archived" : "active", query: remoteKeyword, signal }),
         enabled: remoteEnabled && open && sessionHydrated,
     });
     const remoteItems = useMemo<AssetLibraryPickerItem[]>(() => (remoteQuery.data?.assets || []).filter((asset) => asset.kind !== "entity" && asset.kind !== "model").map((asset) => ({
@@ -144,9 +158,15 @@ export function AssetLibraryPickerModal({
     const localItems = useMemo(() => allItems.filter((item) => !item.external), [allItems]);
     const pluginItems = useMemo(() => allItems.filter((item) => Boolean(item.external)), [allItems]);
     const hasPluginSource = useMemo(() => Object.keys(categoryLabels).some((value) => value.startsWith("external:")) || pluginItems.some((item) => item.category.startsWith("external:")), [categoryLabels, pluginItems]);
-    const sourceItems = source === "plugin" ? pluginItems : remoteEnabled ? remoteItems : localItems;
+    // 媒体类型在分类之前收窄数据源，让左侧分类计数、网格和分页始终描述同一批素材。
+    const sourceItems = useMemo(() => {
+        const base = source === "plugin" ? pluginItems : remoteEnabled ? remoteItems : localItems;
+        if (mediaKind === "all") return base;
+        return base.filter((item) => pickerItemMediaKind(item) === mediaKind);
+    }, [localItems, mediaKind, pluginItems, remoteEnabled, remoteItems, source]);
     const activeSourceItems = useMemo(() => sourceItems.filter((item) => !item.archived), [sourceItems]);
     const archivedItems = useMemo(() => sourceItems.filter((item) => item.archived), [sourceItems]);
+    const mediaKindOptions = useMemo(() => (remoteKind ? [] : Array.from(new Set(mediaKinds))), [mediaKinds, remoteKind]);
     const sourceFolders = source === "plugin" ? folders : [];
     const showCategories = source === "local" || !sourceFolders.length;
     const normalCategories = useMemo(() => remoteEnabled ? Object.keys(categoryLabels).filter((value) => value !== "archived" && !value.startsWith("external:")) : ["all", ...Array.from(new Set(activeSourceItems.map((item) => item.category || "other"))).filter((value) => value !== "all")], [activeSourceItems, categoryLabels, remoteEnabled]);
@@ -180,6 +200,7 @@ export function AssetLibraryPickerModal({
 
         setFolderId(initialFolderId);
         setCategory(initialCategory);
+        setMediaKind("all");
         setSource("local");
         setKeyword("");
         setUploadedItems([]);
@@ -200,6 +221,11 @@ export function AssetLibraryPickerModal({
         setSource("local");
     }, [hasPluginSource, source]);
 
+    useEffect(() => {
+        if (mediaKind === "all" || mediaKindOptions.includes(mediaKind)) return;
+        setMediaKind("all");
+    }, [mediaKind, mediaKindOptions]);
+
     const selectSource = (nextSource: "local" | "plugin") => {
         if (nextSource === "plugin" && !hasPluginSource) return;
         setSource(nextSource);
@@ -404,6 +430,16 @@ export function AssetLibraryPickerModal({
                 </header>
                 <div className="asset-picker-body">
                     <nav className="asset-picker-categories" aria-label="素材分类">
+                        {mediaKindOptions.length > 1 && !isRecycleBin ? (
+                            <>
+                                <span className="asset-picker-nav-label">媒体类型</span>
+                                {(["all", ...mediaKindOptions] as const).map((value) => (
+                                    <button key={value} type="button" className={cn("assets-filter-item", mediaKind === value && "is-active")} aria-pressed={mediaKind === value} onClick={() => setMediaKind(value)}>
+                                        <span className="assets-filter-item-label">{value === "all" ? "全部类型" : ASSET_PICKER_MEDIA_KIND_LABELS[value]}</span>
+                                    </button>
+                                ))}
+                            </>
+                        ) : null}
                         {sourceFolders.length ? (
                             <>
                                 <span className="asset-picker-nav-label">文件夹</span>
@@ -527,6 +563,13 @@ export function AssetLibraryPickerModal({
     );
 }
 
+// 角色卡、3D 模型等非媒体条目没有媒体类型，媒体筛选生效时不参与匹配。
+export function pickerItemMediaKind(item: AssetLibraryPickerItem): AssetPickerMediaKind | undefined {
+    if (item.mediaKind) return item.mediaKind;
+    const kind = item.external?.item.kind || item.asset?.kind;
+    return kind === "image" || kind === "video" || kind === "audio" || kind === "text" ? kind : undefined;
+}
+
 function PickerCard({ item, selected, onToggle }: { item: AssetLibraryPickerItem; selected: boolean; onToggle: () => void }) {
     const disabled = Boolean(item.disabledReason);
     return (
diff --git a/web/src/components/canvas/asset-picker-modal.tsx b/web/src/components/canvas/asset-picker-modal.tsx
index 3f3380b9b..a934b5940 100644
--- a/web/src/components/canvas/asset-picker-modal.tsx
+++ b/web/src/components/canvas/asset-picker-modal.tsx
@@ -50,6 +50,7 @@ export function AssetPickerModal({ open, multiple = true, onInsert, onClose }: P
                 category: normalizeAssetCategory(asset.category),
                 archived: asset.status === "archived",
                 kindLabel: asset.kind === "image" ? "图片" : asset.kind === "video" ? "视频" : asset.kind === "audio" ? "音频" : "文本",
+                mediaKind: asset.kind,
                 asset,
                 searchText: (asset.tags || []).join(" "),
             })),
@@ -62,6 +63,7 @@ export function AssetPickerModal({ open, multiple = true, onInsert, onClose }: P
         <AssetLibraryPickerModal
             remoteLibrary
             open={open}
+            mediaKinds={["image", "video", "audio", "text"]}
             items={items}
             categoryLabels={{ ...categoryLabels, ...externalAssetSources.categoryLabels }}
             folders={externalAssetSources.folders}
diff --git a/web/src/components/canvas/canvas-project-asset-modal.tsx b/web/src/components/canvas/canvas-project-asset-modal.tsx
index 667826fe0..77551138e 100644
--- a/web/src/components/canvas/canvas-project-asset-modal.tsx
+++ b/web/src/components/canvas/canvas-project-asset-modal.tsx
@@ -1,6 +1,6 @@
 import { useMemo } from "react";
 
-import { AssetLibraryPickerModal, type AssetLibraryPickerItem } from "@/components/assets/asset-library-picker-modal";
+import { AssetLibraryPickerModal, type AssetLibraryPickerItem, type AssetPickerMediaKind } from "@/components/assets/asset-library-picker-modal";
 import { useExternalAssetSources } from "@/hooks/use-external-asset-sources";
 import { externalAssetToInsertPayload, type InsertAssetPayload } from "@/components/canvas/asset-picker-modal";
 import { compileCharacterReferencePrompt } from "@/lib/canvas/canvas-character-reference";
@@ -55,12 +55,15 @@ export function CanvasProjectAssetModal({
                     character?.character?.representations.find((representation) => representation.role === "primary") ||
                     character?.character?.representations.find((representation) => representation.role === "front");
                 const remoteResourceId = resourceIdFromStorageKey(project?.storageKey);
+                // 项目资产可能只有服务端记录、没有本地素材，媒体类型要显式声明，筛选才能覆盖它们。
+                const mediaKind = character ? undefined : pickerMediaKind(media?.kind || project?.mediaType);
                 return {
                     id: item.id,
                     title: character?.title || project?.title || media?.title || "未命名资产",
                     category: item.category,
                     folderId: item.folderId,
-                    kindLabel: character ? "角色卡" : (media?.kind || project?.mediaType) === "video" ? "视频" : (media?.kind || project?.mediaType) === "audio" ? "音频" : (media?.kind || project?.mediaType) === "text" ? "文本" : "图片",
+                    kindLabel: character ? "角色卡" : mediaKind === "video" ? "视频" : mediaKind === "audio" ? "音频" : mediaKind === "text" ? "文本" : "图片",
+                    mediaKind,
                     asset: media,
                     imageUrl: coverRepresentation ? resourceFileUrl(coverRepresentation.resourceId) : project?.mediaType === "image" && remoteResourceId ? resourceFileUrl(remoteResourceId) : undefined,
                     imageStorageKey: coverRepresentation ? `resource:${coverRepresentation.resourceId}` : undefined,
@@ -77,6 +80,7 @@ export function CanvasProjectAssetModal({
         <AssetLibraryPickerModal
             remoteLibrary={!detail}
             open={open}
+            mediaKinds={["image", "video", "audio", "text"]}
             items={pickerItems}
             categoryLabels={{ ...categoryLabels, ...externalAssetSources.categoryLabels }}
             initialCategory={initialCategory}
@@ -117,6 +121,10 @@ export function CanvasProjectAssetModal({
     );
 }
 
+function pickerMediaKind(value?: string): AssetPickerMediaKind {
+    return value === "video" || value === "audio" || value === "text" ? value : "image";
+}
+
 function toInsertPayload(item: ProjectPickerItem): InsertAssetPayload {
     if (item.character?.character) {
         return projectCharacterToInsertPayload(item.character);
diff --git a/web/src/pages/projects/detail/assets.tsx b/web/src/pages/projects/detail/assets.tsx
index f72c7aedf..4e5fd335a 100644
--- a/web/src/pages/projects/detail/assets.tsx
+++ b/web/src/pages/projects/detail/assets.tsx
@@ -442,6 +442,7 @@ export default function ProjectAssetsView({ detail, refreshProject }: ProjectDet
             <AssetLibraryPickerModal
                 open={addOpen}
                 remoteLibrary
+                mediaKinds={["image", "video", "audio", "text"]}
                 items={availablePickerItems}
                 categoryLabels={{ ...pickerCategoryLabels, ...externalAssetSources.categoryLabels }}
                 folders={externalAssetSources.folders}
diff --git a/web/src/pages/projects/detail/settings.tsx b/web/src/pages/projects/detail/settings.tsx
index c5dc59ad6..9bfbe3c83 100644
--- a/web/src/pages/projects/detail/settings.tsx
+++ b/web/src/pages/projects/detail/settings.tsx
@@ -166,6 +166,7 @@ export default function ProjectSettingsView({ detail, refreshProject }: ProjectD
             <AssetLibraryPickerModal
                 open={coverPickerOpen}
                 items={coverPickerItems}
+                mediaKinds={["image"]}
                 categoryLabels={{ all: "全部图片", image: "图片" }}
                 initialCategory="image"
                 initialSelectedIds={currentCoverItemId ? [currentCoverItemId] : []}
diff --git a/web/test/canvas-asset-picker.test.ts b/web/test/canvas-asset-picker.test.ts
index af02a6869..bb3a2f295 100644
--- a/web/test/canvas-asset-picker.test.ts
+++ b/web/test/canvas-asset-picker.test.ts
@@ -4,7 +4,7 @@ import { resolve } from "node:path";
 import { describe, expect, test } from "bun:test";
 
 import { assetPickerItemsToInsertPayloads } from "@/components/canvas/asset-picker-modal";
-import type { AssetLibraryPickerItem } from "@/components/assets/asset-library-picker-modal";
+import { pickerItemMediaKind, type AssetLibraryPickerItem } from "@/components/assets/asset-library-picker-modal";
 import type { ImageAsset, TextAsset } from "@/stores/use-asset-store";
 
 const timestamp = "2026-08-28T00:00:00.000Z";
@@ -59,6 +59,36 @@ describe("canvas asset picker", () => {
     });
 });
 
+describe("asset picker media kind", () => {
+    const base: AssetLibraryPickerItem = { id: "item", title: "素材", category: "other", kindLabel: "图片" };
+    const image: ImageAsset = {
+        id: "asset",
+        kind: "image",
+        title: "图",
+        coverUrl: "",
+        tags: [],
+        createdAt: timestamp,
+        updatedAt: timestamp,
+        data: { dataUrl: "", width: 1, height: 1, bytes: 1, mimeType: "image/png" },
+    };
+
+    test("prefers the declared media kind over the underlying record", () => {
+        expect(pickerItemMediaKind({ ...base, mediaKind: "video", asset: image })).toBe("video");
+        expect(pickerItemMediaKind({ ...base, asset: image })).toBe("image");
+    });
+
+    test("resolves external plugin items and skips records without a media kind", () => {
+        const external: AssetLibraryPickerItem = {
+            ...base,
+            external: { sourceId: "eagle", sourceName: "Eagle", item: { id: "audio-1", title: "外部音频", kind: "audio" } },
+        };
+
+        expect(pickerItemMediaKind(external)).toBe("audio");
+        // 角色卡、3D 模型这类条目没有媒体类型，媒体筛选生效时不应被当成图片留在列表里。
+        expect(pickerItemMediaKind(base)).toBeUndefined();
+    });
+});
+
 describe("canvas context menu motion", () => {
     test("keeps hover feedback stationary while retaining spotlight surfaces", () => {
         const styles = readFileSync(resolve(import.meta.dir, "../src/styles/globals.css"), "utf8");