The data on the cloud chain can only be accessed by the owner and the authorized person. The access right of the data is set by the user, and it is determined by the smart contract. For example, our patient users can authorize their own data access right to a specific hospital. When the user is sick, the doctor can directly call the data for diagnosis. When the data is only accessible by the owner, we can use the smart contract Users can get treatment immediately after a sudden illness. They can get data from the smart contract, and then they can receive timely treatment in the hospital with automatic authorization. The data generated by users can be safely stored in the health bank, and can also be exchanged in the free circulation value to obtain the cloud chain digital assets or exchange the corresponding equity services. Data use needs to meet the global cloud chain authentication protocol, and with the authorization of the owner, all participants of the cloud chain can become the data extractors (including ordinary patients, users, medical institutions, insurance institutions), etc. Using the distributed storage in the blockchain can ensure the data flow in the network more safely.