In recent years, many Chinese enterprise have implemented enterprise resource planning (ERP). Many journals and newspapers published papers on why and how to implement ERP, but to the relationship between ERP and performance of enterprise, and how to evaluate the effect of ERP, have not paid enough attention. In this paper, the problem of evaluation of ERP implementing in Chinese enterprise was studied. One comprehensive evaluation index system which combines the application ability and application effect indexes was advanced, and one case of ERP implementation in Chinese enterprise was studied to demonstrate the effectiveness of the evaluation index system.