This book proposes that the short-term goal of the current reform of the international monetary system should be a combination of controlling "imbalances" and "the risk of the dollar", namely using the balance of payments coordination mechanism to suppress risks by exchange rate cooperation. The reforms of international reserve currencies, international financial institutions, and international financial regulation provide a good external environment for the stable development of the world economy. The book discusses the mechanisms that will continue to support the hegemony of the US dollar and the US dollar system in the future, including the commodity dollar return mechanism, the international debt repayment mechanism, the petroleum dollar pricing mechanism and the dollar rescue mechanism in financial crisis. The book predicts that the current international currency system dominated by the US dollar will remain sustainable for a long time. Finally, the book proposes four strategies for China's participation in the reform of the international monetary system.