随着因特网的普及和发展,通过因特网搜集、检索信息已经成为很普遍的现象和行为,而网络信息检索工具更是多种多样。本文概括介绍了因特网信息检索工具的分类特点并进行了分析比较;在此基础上介绍了因特网索引的特点及其标引方法,并就目前网络比较流行的4大搜索引擎进行个案分析研究。 With the popularization and development of the Internet, it has become a very common phenomenon and behavior to collect and retrieve information through the Internet, and more and more information retrieval tools are available. This paper gives an overview of the classification of Internet information retrieval tools and analyzes and compares them. Based on this, we introduce the features and indexing methods of Internet indexing, and conduct a case study on the four popular search engines.