With the advanced computing concept of people-oriented and ubiquitous, pervasive computing has become a hot field of computer studies. The rapid development of embedded technology, wireless network technology, mobile computing technology turn pervasive computing theoretical research into practical possibility. To achieve genuine universal computing environment, it is also currently facing many challenges, one of which is its architecture study. View from the current universal calculating developments, a number of pervasive computing models for different specialize areas have been put forward, but also a generic module contains security mechanism for study is absent. According to the current situation and trend of pervasive computing, the service of pervasive environment is categorized into two parts. By considering that idea and all the situations on the basis of collaboration and security, a pervasive computing reference architecture has been put forward. In this paper, we discussed that module, emphasis on it's computing layer and security mechanisms, and other key researches