Abstract
This study proposed a management system of the electronic medical records in the blockchain environment. In the proposed system, electronic medical records are first stored in the InterPlanetary File System (IPFS), and then the system generates the hash value, which will be sent to the smart contract to correlate with the patients' data. After that, if the medical staff's medical authority is confirmed by the system, the smart contract can send back the hash value that IPFS generated, and thus the system will present the complete electronic medical records. In the experimental simulation, the results showed that our proposed electronic medical record management and storage process not only can block forged or tampered electronic medical records via smart contracts, but also make it easy to integrate electronic medical records and share medical resources.