Abstract: Blog,this way from cultural transmission network to the general public provides a great space of freedom of speech online,and gradually releases the people’s rights to public discourse.This phenomenon of popular culture has many functions,to promote diversity in our society,to provide freedom to the public release of the sites of expression,and to offer unrestricted space of exchange platform,which are the external dominant functions of blog.Blog,in the social culture,brings a new way of life.In this way,people can express their inner thoughts and start a new life.