In this paper, the necessity of building e-commerce environment security system is analyzed in detail, and that the construction of electronic business environment security is not only beneficial to the electronic commerce itself, but also to provide consumers with more excellent consumer environment. Followed by the construction of the security of e-commerce environment was AHP analysis, come to computer technology play a major role in the security of e-commerce environment, as well as e-commerce system to assess the level of risk assessments.