Currently, the growth of pervasive computing has introduced an increasing number of services in daily life. There is an urgent need for service provision framework of pervasive computing applications. In this paper, we propose a pervasive service framework that includes a component-based service model and a user-oriented Quality of Service (QoS) model. The fuzzy expression of user preference is covered in our design. Moreover, we reduce the kernel of the service selection problem to Multiple Attribute Decision Making (MADM) problem with incomplete preference, which can be solved by classic methods. The result of experiments on current implementation justifies our design.