Abstract: (1)On the basis of what has already been achieved,the authors set up an index system for the synthetic evaluation of -regional economy by applying the principle of grey incidence. The system consists of 4 synthetic indexes ,the economic index,the scientific and technical index,the social structural index and the living quality index. There are altogether 16 subindexes in the system. (2)To counter with the shortcomings or deficiency of the compositing index method and marking method that had been used frequently in synthetic evaluation concerning multiindex, A triangular model is put forward based on the idea and method of grey system theory. Moreover,the mechanism of applying the new model has been studied. (3)Dealing with the realistic needs in the management of Henan economy, the authors have sized up the developing level of Henan economy. Factors that affected the development of Henan economy are discussed.