In 2011, micro-blogging, social network site, video-sharing site, mobile social networking applications and e-commerce as the representative of the social network media has shown diversity to develop a tendency.Young people have the great interaction, sharing and mobilization strength by SNS,which has bought A change of structure of social opinion, and national political agenda variables. Paying attention to and making good use of social network, opening channel and the protection of personal information, may well be effective measures of guiding social network public opinion. <<