| The nature of market economy asks the role of urban plan is limited. The elastic control of regulatory indicators is to solve the problems of regulatory plan's unceasing vary influent factors in the process of drawing up and regulatory indicators'frequent adjustment in the process of carrying out to adapt urban construction and management demands in the background of market economy. And defines the scope of elastic research in"bids,auction,hangs"and competitive land.The article expounds the problem of indicators'frequent adjustment in the process of regulatory plan implementation and draws the cause of elastic control research. Then explain the supports of other theories, like philosophy,management,economy,physics, indicate the rationality,economic foundation of elastic control, introduce related examples in country and at abroad, and show the elastic source,context,principle,superiority,social approve of urban planning's elastic theory. On the base of analyzing the connotation and control principle of indicators, this part illustrates indicators'uncertainty in the process of drawing up. Among them FAR and land nature are the most direct factors to land develop strength, then benefits, so the adjustment applications of them are the most. The elasticity control methods, such as FAR awards,TDR,compatible character, have actual meaning are the main part of this paper.In the end, the paper confirms the elastic nature of urban planning,management process and elastic control method, when the real estate market mature is developed,legal system is strengthen and judged by law, the way of elastic control will be more meaningful. And urban planning's effectiveness asks solve new problems continuous arising meanwhile, so we should see the elastic management methods unceasing perfected in the point of growing view. |