When the power grid operation mode is changed,the relay operation mode should be adjusted synchronously,otherwise the relay may malfunction or reject action.The relay operation rule base design based on general protection model is proposed.The structure and function module of relay operation verification system are analyzed.The implementation of key modules such as equipment operation state identification and relay operation verification process is elaborated.The system test result is introduced.Using the power grid real-time operation status and relay operation information,the system verifies the relay operation results and determines whether the adjusted relay operation mode meets the requirements of power grid operation.