With the development of science and technology, people tends to read news on the Internet. Since headline is the eye of the web-news, this paper took a cognitive analysis of headlines of the web-news under the theoretical framework of orientational metaphor, ontological metaphor and structural metaphor. The research materials are the daily headlines of news on IFENG.COM and People.cn from December 27,2013 to January 8, 2014. It found out that ontological metaphor can be divided into physical metaphor, container metaphor, body metaphor, and structural metaphor can be specified in terms of war, education, game, drama , sports, weather, traffic, medicine, food. Meanwhile, there exists combination of different kinds of metaphors, which helps the readers to understand the news and capture readers’ eyes. Through statistical analysis, this paper found out that structural metaphor is more frequently seen than others, which indicates that the structural metaphor is a significant tool for achieve understanding and cognition.