2010 is the year when microblog starts to develop in China, in which the craze for microblog is spreading into all aspects of people's lives, with a huge impact on public opinion. This report starts with the history, phenomenon, function, and the characteristics of the communication of microblog in China, and analyzes the influence of microblogging from many aspects, including its relation to citizen's expression, traditional media, public opinion and social mobilization. Beside, to describe the panorama of microblog in China, this report also analyzes the spreading of rumors on microblog,and takes microblogging as a new life style. It predicts that microblog will develop fast and steadily and gradually become mature. <<