Blockchain as the underlying technology of Bitcoin has attracted people’s attention，and also its application field has been expanded greatly，which can be divided into two types：one is the extension of digital currency application which can be collectively called digital assets；the other is the application used in real economy and government affairs，such as medical care，finance，agriculture，supply chain and so on. The regulatory department holds a positive exploring and support attitude to the second category. We can see that regulatory department have launched regulatory sandboxes、formulated relevant standards，and issued policy plans to promote technological application innovation and industry-standard development；And generally be cautious to the supervision of digital currencies. It first summarizes the overall characteristics of current international policy and regulation in the blockchain field. And then it analyzed the support for blockchain technology and applications from innovative regulatory methods，standards，and support policies. Furthermore，this report summarizes digital currency the international joint supervision and the actions of various countries in digital currency characterization，issuance and use，transaction services and tax policy characteristic aspects from the view of both international association and key countries. It also shows the trend in the future. Firstly，the regulation for digital currency will be more mature and the government will provide more support for the development of blockchain technology. Secondly，the progress of jointly supervision among different countries or institutions will be speed up. Thirdly，regulation framework will be formed gradually and each country may have its own characteristics.