Abstract: This paper discusses the research status of blockchain as a service, introduces the working principle of blockchain as a service through the combination of cloud computing and blockchain technology, discusses the basic design principles according to the service object of blockchain as a service, and analyzes the basic architecture of mainstream blockchain as a service platform. As a kind of cloud service, blockchain as a service is the cloud rental network platform of blockchain service facilities. According to the characteristics of its tenants, the computing resources, platform resources, software resources and hardware resources are shared to the maximum extent. The blockchain as a service ensures that the business scale of tenants can be flexibly scaled through the large-capacity resource pool, and the rented facilities can be shared and enjoyed exclusively, thus ensuring safe and reliable operation. In view of the blockchain as a service risk regulation, technical difficulties, performance and other issues, the current research deficiencies and future research directions are analyzed and prospected.

Key words: blockchain as a service, cloud computing, blockchain