The emergence of Internet changing people's lifestyle, its social networking site gradually shift from physical space to virtual space above, in this context, the Internet has become indispensable to life at the same time, the establishment of personal files on the network has become a new trend. A large number of users on Facebook to share their personal information, opened in the past many researches are still mostly the community web site of the information, products, systems and service quality issues to investigate the user satisfaction and continued use intentions. This research focuses on the user point of view, description of planned behavior to explore the personal attitudes, subjective norms, perceived behavior, combined with the network behavior of construct-related dimensions, to discuss individual factors of the personal network files. Finally, this research found that users due to 'gender',' age', 'education ', 'monthly income ', 'occupation' of the different intentions for opening up personal network files. Among the relevant dimensions in the research, the reference peer group is the greatest impact to make people open personal network files or not. The users' own network capacity does not affect the intention. Website trust mechanisms influence behavioral intentions, But when put it with the risk, it will affected by the risk to the user's intent.