With the development of Internet, new applications are emerging in an endless stream, and traditional applications are constantly changing. Over the past decade, Internet applications develop rapidly, and great changes have taken place in application traffic characteristics of ordinary hosts and servers. Analyzing Internet application traffic characteristics is meaningful to understanding today's network applications, traffic classification, application optimization, network planning and so on. This paper first studies the current composition of Web traffic on the Internet based on analyzing HTTP (Hypertext Transfer Protocol) messages. Instead of page response time, it analyzes types of Web servers and measures Web server response time to speculate the development of Web servers.