Abstract:With the rapid development of Web2.0, virtual community increasingly presents the characteristics of small world networks. A Case in point is that the agitators of London riots and Russia demonstration employed social network to spread public opinion. Online public opinion is becoming a more and more important factor to affect the national profit and security.Even inestimable impacts and losses on economy and society would be caused without timely attention and proper guidance on online public opinion. Therefore, how to guide online public opinion is a new challenge for concepts, methods and means of enhancing and innovating social management. This paper focuses on two questions:(1)how to identify online public opinion which needs guidance? (2)how to guide if necessary? For that, three methods for identification are firstly proposed. Then, if necessary, guide strategies are given on how to detect and explore opinion leaders and potential key people based on social network analysis, which will provide scientific and quantitative research basis for guiding online public opinion of innovation social management.