网页抓取器又叫网络机器人(Robot)、网络爬行者、网络蜘蛛。网络机器人（Web Robot），也称网络蜘蛛(Spider)，漫游者（Wanderer）和爬虫（Crawler），是指某个能以人类无法达到的速度不断重复执行某项任务的自动程序。他们能自动漫游与Web站点，在Web上按某种策略自动进行远程数据的检索和获取，并产生本地索引，产生本地数据库，提供查询接口，共搜索引擎调用。-web crawling robots - known network (Robot), Web crawling, spider network. Network Robot (Web Robot), also called network spider (Spider), rovers (Wanderer) and reptiles (Crawler), is a human can not reach the speed of repeated execution of a mandate automatic procedures. They can automatically roaming and Web site on the Web strategy by some automatic remote data access and retrieval, Index and produce local, have local database, which provides interfaces for a total of search engine called.