In recent years,the impact of the rise of emerging powers on the transformation of international order has been a focus for scholars at home and abroad . However,most scholars mainly remain to pay more attention to the importance of the distribution of international power on the transformation of international order,attaching less importance to the concepts and rules of legitimacy . In fact,the transformation of international order relates not only to the distribution of international power,but also relates tofunction of norms andconcepts of legitimacy becauseanyinternational order is the results of the interaction of these elements : the distribution of international power,international institution and the dominant ideas of values .International legitimacy involves two dimensions : the core principles of legitimacy and the practice of legitimacy,both of which have intimate relations with social consensus .Consensus is fundamental to international order because it is itself the product of the shared values of a society .As a dimension of legitimacy,consensus is not simply about procedural matters,it expresses the substantive values of the society more generally . Obviously,the degree of legitimacy present in any particular international order is directly related to the stability of that order .Whether the developing and developed countries will attain the basic consensus about the common interests and common values in international order relates not only to the legitimacy of the extant international order,but also concerns the stability of the extant international order . International order generally includes international political order and international economic order . The defects of the extant international economic order lie in not only its inability to cope with complex challenges posed by the contemporary global economy,but its outdated system which fails to reflect the reality of the shifting global economiclandscapein the ageof theemerging economies'rise .Thesedefects of thecurrent international order aredue to the instabilityof U .S dollar,the insufficiency of the decision-making mechanisms of IMF and the World Bank and the lack of financial supervision in these organizations andetc .As a result,the effectivenessandlegitimacy of the IMF and WorldBank have been seriously questioned .The rise of emerging powers and their demands tochange the unreasonablestateof the current international financial system and reshape such a system have strongly pushed forward the formation of common consensus of the international society on such questions as raising the representation and the voice of the emerging economic powers in IMF and World Bank . The concepts and principles advocated by the emerging powers will surely influence the transformation of international political order . The emerging powers argue that the new international order should be founded on respect for state sovereignty and other recognized principles and norms of international law .Some of the guiding principles they emphasize include the Five Principles of Peaceful Coexistence and that international exchanges should be fair,just,reasonable,mutually beneficial,mutually respectful,and that negotiations should be done on an equal footing . The concepts and principles advocated by emerging powers are significantly different from the dominant mode of thinking found in those international order in history—the concept of balance of power—and they are also obviously different from the concepts and the norms of international order based on democracy,human rights as advocated by the Westerncountries after the endof the Cold War .Although all current parties hope theinternational order in favor of its own direction of development,the futureof international order will largely depend on the traditional powers and the emerging powers to obtain fundamental consensus on the principal norms and procedures governing international order . Whether the Western powers can meet the requests of the emerging powers about fair changes of international order to a certain degree,and whether they can further establish a global system though the cooperation of new and old powers based on equal status and extensive consultations,will decide on the success or failure of cooperation between the traditional powers and the emerging powers .