diff --git a/packages/ui/certd-server/src/controller/basic/file-controller.test.ts b/packages/ui/certd-server/src/controller/basic/file-controller.test.ts
new file mode 100644
index 000000000..a09837292
--- /dev/null
+++ b/packages/ui/certd-server/src/controller/basic/file-controller.test.ts
@@ -0,0 +1,20 @@
+/// <reference types="mocha" />
+/// <reference types="node" />
+
+import assert from "node:assert/strict";
+
+import { isImageFile } from "./file-controller.js";
+
+describe("FileController.isImageFile", () => {
+  it("detects uploaded logo image files", () => {
+    assert.equal(isImageFile("data/upload/public/user/logo.PNG"), true);
+    assert.equal(isImageFile("data/upload/public/user/logo.svg"), true);
+    assert.equal(isImageFile("data/upload/public/user/logo.webp"), true);
+  });
+
+  it("does not treat non-image downloads as logo images", () => {
+    assert.equal(isImageFile("data/upload/public/user/archive.zip"), false);
+    assert.equal(isImageFile("data/upload/public/user/cert.pem"), false);
+    assert.equal(isImageFile("data/upload/public/user/logo"), false);
+  });
+});
diff --git a/packages/ui/certd-server/src/controller/basic/file-controller.ts b/packages/ui/certd-server/src/controller/basic/file-controller.ts
index d2dca2acd..e0340fd79 100644
--- a/packages/ui/certd-server/src/controller/basic/file-controller.ts
+++ b/packages/ui/certd-server/src/controller/basic/file-controller.ts
@@ -5,6 +5,13 @@ import { nanoid } from 'nanoid';
 import { cache } from '@certd/basic';
 import { UploadFileInfo } from '@midwayjs/upload';
 
+const imageExtSet = new Set(['.apng', '.avif', '.bmp', '.gif', '.ico', '.jpeg', '.jpg', '.png', '.svg', '.webp']);
+const imageCacheSeconds = 3 * 24 * 60 * 60;
+
+export function isImageFile(filePath: string) {
+  return imageExtSet.has(filePath.substring(filePath.lastIndexOf('.')).toLowerCase());
+}
+
 /**
  */
 @Provide()
@@ -40,8 +47,11 @@ export class FileController extends BaseController {
       userId = this.getUserId();
     }
     const filePath = this.fileService.getFile(key, userId);
-    this.ctx.response.attachment(filePath);
-    this.ctx.response.set('Cache-Control', 'public,max-age=2592000');
+    if (isImageFile(filePath)) {
+      this.ctx.response.set('Cache-Control', `public,max-age=${imageCacheSeconds}`);
+    } else {
+      this.ctx.response.attachment(filePath);
+    }
     await send(this.ctx, filePath);
   }
 }