The gold standard system mainly uses gold as a reserve and binds gold with its own currency to realize currency floating. The global gold standard was established on February 27th, 1945, 1945. The abbreviation of world economic history is Bretton Woods system. At that time, representatives from 22 countries around the world signed the Bretton Woods Agreement and formally established the International Monetary Fund and the World Bank. But then, as the main currency of the system, the dollar depreciated. The United States strengthened its control over global hegemony and disintegrated this system in 197 1 year. The world began to develop financial capitalism with the US dollar as the main reserve currency. Therefore, most countries in the world are pegged to the dollar, and gold reserves only operate for a small amount of foreign exchange reserves. Once the currency overflows, gold will show the attribute of non-sovereign currency. So now all sovereign countries in the world use the US dollar as their main foreign exchange reserve currency. Gold is not the main currency form, but an option to resist the risk of falling dollar.