The Writing of the blog has its social and cultural background which is the fertile soil for the appearing and development of the blog writing—the debris of the social context,the grassroots of the cultural structure and the rapid development of cultural life of the network,as well as the need for interpersonal communication from the psychological points of view—the desire for public and deep communication and the trend from sharing the inner minds to publicly sharing.And with the further development of the blog,a new wave of the information age will come into being,which will have enormous and profound impact on people's social and cultural life.