In connection with questions about the assessment methods on public project, developing the assessment methods respective from the overall project and all kinds of stakeholders was proposed. The project assessment should stress efficiency, the assessment from stakeholders should emphasize participation, fairness and sustainable. In order to embody the multi - value, the multi - dimension regulation and control measures including public pricing, investment sharing, externalities processing and payment shifting should be adopted. Model system including eight objective functions was constructed. Finally, an example, which was used to examine the feasible of methods, was given.