Judging from the current situation, it should be said that the depreciation of the US dollar has contributed to the high oil price. It is difficult to fully explain that oil prices have increased several times in just one or two years only from the relationship between supply and demand. Because oil is priced in dollars, oil prices naturally rise, and speculators in futures and spot markets are also speculating on high oil prices. In addition, the market generally expects the dollar to continue to weaken, which further encourages speculation on high-priced oil. In addition, the relationship between the dollar and oil price is not a simple linear relationship, but only a certain correlation. In addition to the international environment, the decline of the US dollar is closely related to the US economy and monetary policy, and some of these relationships are related to oil prices, while others are not.