With the rapid development of Internet, the network resources are getting more and more abundant, how to extract information from network, especially from Deep Web has been focused on. A new generation of Ajax-based web information extraction has become a hot topic. By analyzing the key technology of the Ajax-supported Deep Web Crawler, this paper puts forward the architecture of the Ajax-Supported Deep Web Crawler, and illustrates an algorithm to crawl the Ajax-supported Deep Web automatically, which lay the foundation for the design of the overall framework of an Ajax-supported Deep Web Crawler.