The past 2007 was a harvest year for RSS.RSS,or Really Simple Syndication,was the backbone of all early developments in the new era of the internet.It made blogs readable,podcasts subscribable,wikis trackable and search persistent.Three years after a 2004 Pew study found that 1 out of 20 people online said they used an RSS aggregator to read content online(in 2004).RSS was in 2007 the 3rd most searched for what is term on Google all year.It can be concluded that people are very concerned about the RSS.In this paper,I introduced systematically the definition of RSS,its characteristics,the system,achieving mechanism,its progress and application,hoping to bring a comprehensive understanding of RSS.