In recent years, how to promore the Utilization of Internet is a main issue of national information policy. In this study, we focused our approach to find promoting sttategies for Internet utilization on three sector′s users, governments, enterprises, and households. Promoting the Internet utilization of these three sector′s users is a very difficult problem, because their information levels are different and information gap among them can be regarded as bottleneck. And since the interactions between user′s demands and diverse information seccor′s factors are very complex, policy leverages can not find easily. By the system dynamics methodology, this paper examines the interrelationships between three user′s demand mechanism and information policy sector. Information policy sector consist of four sectors, infrastruccure policy seccor, application-contents sector, governance sector, and access and price policy sector (free access policy, literacy policy, telecommunication price policy, etc.). To find and investigate policy leverage that will help understanding dynamic behavior of users in using Internet we build a causal loop diagrams and SD models by using survey data obtained from three sectors′specialized users, 488 persons.