Since the term "Web 2.0" appears, a new generation of Web is coming. There are many articles referring to how to design a Web 2.0 website. However, the traditional Web 1.0 websites are still multitudinous currently. The developers of the traditional Web 1.0 website may not have adequate techniques to reconstruct the websites into Web 2.0 timely. Rebuilding a website often takes tremendous efforts. A simple and effective strategy to upgrade the websites is essential. The paper attempts to provide a flexible framework, by introducing the Web 2.0 Proxy, to upgrade websites from Web 1.0 to Web 2.0. The Web 2.0 Proxy combines the original Web 1.0 web page with the additional Web 2.0 information together on the fly. Therefore, the developers need not to rewrite their websites, and the users are able to experience the additional Web 2.0 functions. In the paper, we have implemented the tag and comment functionalities of Web 2.0.