The article overviews a complex theme of the Asian cooperation of the financial institutions aimed at building the Asian financial system as a whole. AIIB and NDB are the core of this process and their influence on the formation of the Asian finance is researched and pinpointed in this paper. The main findings of the article are: the key features of the Asian financial system and the tracks of its development; the impact of the AIIB and the ADB on the development of Asian economies and their role in the transformation of the financial interactions in Asia. The novelty of the article includes he method of assessment of the impact of the development of AIIB on the developing economies through the investments and the estimation of the role od AIIB and NDB in the development of Asia.