Rescearch On The Evaluation Method Of City Economiclevel Based On Grey System

With the sustained and rapid development of economy in China, the economic sustainable development of the city, not only can use molding auxiliary between the cooperation of cities, also can use cooperation between different cities. If we want have prosperity of cities and sustained economic, can also through in cooperation within the regional economic framework of different attribute and the different level of the city. So as to further release a specific core functions in certain areas of the city, and in order to have a leading role towards the peripheral city. Therefore, according to its function to divided a different city into different level, which can better for resele the driving effects and lading effects towards urban economic development, can have a long-term effect for the economic development.After the China’s opening up and joint to the WTO, china’s three big coastal economic development has gradually developed into the leading ship towards Chinese economy which in order to better and faster develop, also gradually participate in international economic industry and scope of economy, and become the three typical economic.The economic cooperation has gradually developed into a new urban economy industry chain, although still have a gap in scale and speed towards developed countries, the previous research mostly stay in economic development equilibrium level towards urban economy, and the conventional economic development Angle of the upgrading industrial structure and spatial structure adjustment. In view of this, we have to overall analysis and evaluate the level of city and the structure of system.First writing about city economic and its level research and other related theory concept.Based on this, analyses the theoretical significance and the actual application of between city level and the transfer in different energy levels city,analyses of the practical application of significance, then analyzes and explains the advantage and disadvantage between the relevant index of city leads ability and model; Second, analysis the great changes of the energy level structure towards ability and components, so have a specific description. Analyses the level of great cities by a further discussion about economic, highlighted position and use about the city economy towards international status ascension; On the basis of the study about the existing relevant theoretical analysis, construct four latitude index system of this article, the scale of production index, the size of city index, service index and urban agglomeration index, use the component analysis method to measures and analysis each cities level. Use the gray clustering method in order to have a characteristic evaluate to our country’s urban economy; At last, according to all kinds of bottlenecks and conditionality problems towards the cities economic development, and puts forward some constructive measures, and plan to provide a research conclusion which has important guiding roles towards the economic growth of the cities.