Multifunction power meter is a kind of programmable measurement, display, digital communication and electric energy pulse multifunction power meter transmission output and other functions, can, power calculation, data display, data acquisition and transmission, and can be widely used in substation automation, distribution automation, intelligent building, internal energy measurement, management, evaluation. Measurement accuracy is 0.5 grade, LED/LCD field display and remote RS-485 digital communication interface, using MODBUS-RTU communication protocol.