文章介绍了一种Ｉｎｔｅｒｎｅｔ 网上智能检索Ａｇｅｎｔ 的取词方法，并且把机器学习技术应用到这种取词方法中。Ａｇｅｎｔ 通过对样本文档标题关键短语的提取，产生决策树，然后生成布尔查询串，自主地在Ｉｎｔｅｒｎｅｔ 网上进行信息检索。 This paper introduces a method of word retrieval based on Internet intelligent retrieval Agent, and applies the machine learning technique to this method. The Agent generates the decision tree by extracting the key phrase of the title of the sample document, and then generates a Boolean query string to autonomously retrieve the information on the Internet.