In this paper，we for the first time put forward the concept of the “E11”（11 emerging economies），so that the study of emerging economies could target a relatively constant scope and body of subjects. E11 is now the engine that leads the world economy recovery. The fast growing trade linkages among them will be a potential power that pushes their economic growth. E11 also plays an increasingly important role as the source and the host of international capital. New role and new world economy environment require new agenda，such as to improve the ability to influence the decision-making in international organizations；to realize powerful，sustainable，and balanced development of world economy through structural reforms；to reinforce macro prudential policies；to advance the reform of international currency system；and to fight against protectionism in various ways.