Ajax 模式作为Web 2．0 标准核心之一，利用在客户端建构中问层，实现了页面表现与应用逻辑的分离，并且支持B／S 环境下用户操作与服务器响应的异步化。该文在简要阐述了Ajax 模式的核心概念、体系结构和异步交互机制的基础上，通过基于Ajax 模式的网上家园系统的设计和开发，体现了其在异步交互Web 环境中的框架结构，逻辑组织和在改善网络带宽、优化用户体验等方面均优于传统Web 模型。关键词：Ajax 模式；异步；交互；webAbstract:The Ajax pattern took one of Web 2.0 standard cores, it uses in the customer endconstructs in the construction to ask the level, hasrealized the page performance and theapplication logic separation, and supports the user operation and the server responds asynchronous under the environment of B/S. This article was briefly elaborating in the Ajax pattern core concept,the system structure and the asynchronous alternately machine-madefoundation, through on-line homeland system design and the development based on the Ajax pattern, it have manifested it in the asynchronous alternately Web environment portal frame construction, aspect and soon logical organization and in improvement network band width, optimized user experience surpasses the traditional Web model.Keywords:Ajax model; asynchronous；alternation；web