网络爬虫（又被称为网页蜘蛛，网络机器人，在FOAF社区中间，更经常的称为网页追逐者），是一种按照一定的规则，自动的抓取万维网信息的程序或者脚本。另外一些不常使用的名字还有蚂蚁，自动索引，模拟程序或者蠕虫。

-Web crawler (also known as web spider, robot, in the middle of the FOAF community, more often referred to as Web Chaser), is one kind of in accordance with certain rules, automatic program or scr ipt to crawl the World Wide Web information. Do not use the name there are ants, automatic indexing, the simulation program or worm.