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目前,Internet上中文信息的速度和以中文为母语的冲浪者日益增长,据统计,全世界中文因特网人口为350多万,约占全球网络总人口的十分之一。在未来三年内,因特网中文人口预计将持续快速增长至1500万以上。 在渺如烟海的因特网中找出自己所需的中文信息不是一件容易的事,应运而生的搜索引擎,则好比是趴在互联网上的“蜘蛛”,它在不停地在这片文件海中搜索穿流,再将它们选择和汇集起来形成一个动态增长的信息库。 有的引擎采用主动搜寻的方式,即每隔一段时间就将搜寻到的URL（网址）存入数据库;有的引擎则采用被动更新的方式,即由URL的拥有者自行将信息登录到数据库中。多数引擎两种方式兼而有之。 搜索引擎一般都具备分类主题查寻和关键字查寻两种功能。
At present, the speed of Chinese information on the Internet and the surfers with native Chinese are on the increase. According to statistics, the Chinese Internet population in the world is more than 3.5 million, accounting for about one-tenth of the total global population. In the next three years, the Chinese population of the Internet is expected to continue to grow rapidly to more than 15 million. Finding out the Chinese language information you need in a smoky Internet is not an easy task. The resulting search engine is like a spider lying on the Internet, Search through the sea of documents flow, and then select and pool them together to form a dynamically growing information base. Some engines take the initiative to search the way, that is, from time to time will find the URL (URL) stored in the database; some engines use passive updates, that is, by the URL owner to log information into the database . Most engines have both ways. Search engines are generally classified subject search and keyword search with two functions.