Traditional medical records have many problems: First, it is easy to be lost and damaged, and the cost is high. Second, it is easy to cause moral hazards such as medical information disclosure and tampering; Third, medical information is fragmented and cannot be shared. The problem of isolated medical information makes the management cost and credit risk of medical data circulation in China high. Using the characteristics of blockchain information could not be tampered with, decentralization, credible consensus mechanism, not only can solve the high information cost, poor information security and isolated medical information problem, but also boost circulation and sharing medical data by the blockchain, which can make the parties mutually beneficial and win-win, boosting the epidemic prevention and control and traceability, promoting public health management modernization, enhancing the level of public health, improving the efficiency of government date governance. 

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