Electric energy metering device and method with electric quantity monitoring and protecting functions

The invention relates to the technical field of electric energy metering of an electric power system, in particular to an electric energy metering device and method with electric quantity monitoring and protecting functions, which is characterized by comprising a voltage detection module, a current detection module, a protecting module, a tripping module, a wave recording module, a metering module, a display module, a carrier wave module, a CPU (central processing unit) and a storage unit, the CPU is connected with the voltage detection module, the current detection module, the protection module, the tripping module, the wave recording module, the metering module, the display module, the carrier wave module and the storage unit for control, so that the operation condition of the power system can be recorded in real time, the potential safety hazard of the system can be sensed in advance, and precautions are taken in advance; and when a fault really occurs, information such as a fault type, a fault reason and