With the world’s economy further globalization，economic contacts among economies have become closer. The global financial market crossed territory restriction. The product diversity，transaction frequency and scale are unprecedented. Under the pushing of fast development of information technology，digital currency came into being. Digital currency can effectively avoid problems such as high cost of currency making，circulation of counterfeit money and difficulty to confirm the supply of cash. Besides，due to the decline of information cost and informationization，digital currency is much more efficient in implementing the monetary policies. At present，digital currency has attracted attention from more and more countries. Some countries have begun actively to explore to play a bigger role in the development of digital currency.