With the development of blockchain technology and digital assets, the problem pages of digital assets at the legal level are becoming more and more prominent. This article will start with smart contracts and combine the case of Shenzhen Ethereum to analyze the legal issues based on blockchain technology and digital assets. The current status of conservation and its possible future development directions are analyzed. This article will specifically discuss the issue of contract law regulation of smart contracts from the perspective of legal system construction, as well as the compatibility between smart contracts and current contract law. Finally, the following conclusions are drawn: Firstly, consciously accepting the law needs to adapt to social changes and accepting the fact that the law needs to be adjusted. Secondly, at the operational level, the use of technology must comply with. Thirdly, at the research level, relevant legal research must be done, and legal scholars must have inter-professional knowledge and capabilities.