1) Promote the development of international economy and trade. Paying off international creditor's rights and debts with foreign exchange can not only save the cost of transporting cash, reduce risks, shorten payment time and speed up capital turnover, but more importantly, it can expand international credit exchanges, broaden financing channels and promote the development of international economy and trade.

(2) Adjust the surplus and deficiency of international funds. The unbalanced development of the world economy leads to the unbalanced distribution of funds. Some countries have a relative surplus of funds, while others have a serious shortage of funds, so it is objectively necessary to adjust the surplus and deficiency of funds. As a means of international payment, foreign exchange can adjust the surplus and deficiency of funds through international credit and investment, and promote the balanced development of national economies.

(3) Foreign exchange is an important part of a country's international reserves and the main means of payment to pay off international debts. Like the national gold reserve, it can be used as a national reserve asset to pay off debts once the balance of payments is in deficit.