中文摘要：

借助计算机和因特网,信息查询进入了快速发展的网络化联机检索阶段,搜索引擎的出现更是将信息查询推向了智能化发展时代。文章以信息查询发展为主线,

英文摘要：

With the aid of the computer and the Internet, information query entered the rapid development of online retrieval stage, and the occurrences of search engines push the information inquiry into the era of intelligent development. This paper mainly summarizes the development process of keyword query expansion and concept semantic query expansion. The paper described the development of concept semantic structure and large-scale corpus which supported concept semantic query expansion in detail. It has done some basic work for the research of semantic query expansion direction.