The traditional service process model focus on personalized requirements for each customer and build model for everyone. However, when a large number of customers appear, system modeling efficiency rapidly decreased and maintenance cost rapidly increased. To solve this problem, this article proposed massive personalized requirements description service process model, MPSPM. This model firstly divides customer’s personalized requirements into three dimensions: functional, efficiency, and valuable. Furthermore, in order to meet the customized modeling requirements by using minimal modeling tools, MPSPM model define the variable point and modeling standard. Finally, this article discussed a modeling case of outsourcing human resources management system. Especially develop a set of graphical modeling tools to test and verify MPSPM model.