Abstract: With the development of economic globalization and financial market integration, the economies in the world must attach importance to cooperation in the monetary policy and exchange rate policy. By building a two economy model, this paper analyzes respectively the Cournot game equilibrium and Stackelberg game equilibrium. At a time when a symmetrical crisis shock rises, the exchange rate regime will present a fixed or floating exchange rate. It is believed that the economies can enhance counteracting risk of adverse shocks through coordinating in policies, that is, countries in the world shall increase money supply and stabilize their exchange rates when facing adverse crisis shocks.