Abstract
Patent analysis is very important information to compete with the competitors of enterprises and control the research progress for business. There are more and more scholars and research methodology to help patent analysis, but most crucial thing is that lots of patent information like the citing number only provided the emphasis of current time point; it can not get the emphasis of future from citing number. Social network analysis is a theory to analyses network graph, discus the actors function in the social network and it can present the current patent value by patent citation graph. Betweenness and closure are the major two forces to affect the future advance by the network structure of node. This study hopes penetrate the social network analysis to research patent citation graph can predict the future advance for every patent and provide the useful information for patent scholars.