Smart electricity meter data plays an important role in smart grid, and the security problem of traditional smart electricity meter data is more serious. In order to improve the security level of smart electricity meter data, a multi-level analysis and system design scheme of safety vulnerabilities is proposed. The designed system includes the following functions: users can obtain power consumption information and identify power consumption peak independently. Secure file transfer protocol (SFTP) is adopted to transfer the power consumption data from the smart electricity meter to the power enterprise server to improve the security of data transmission; The system adds encryption technology to ensure the integrity and confidentiality of user data through disk encryption, and protects the communication between users and the Web portal through transport layer security (TLS)/encryption socket protocol layer (SSL). The results show that the safety level of the smart electricity meter data system is improved compared with similar systems.