The utility model discloses a wide range electric energy metering device, comprising a control module, a voltage transforming module, a current transforming module, a display module, a communication module, a peripheral storage module, and a switch power supply module, with the latter six modules being connected to the control module. The voltage transforming module is used for proportionally reducing network voltage. The current transforming module is used for converting the load current into proportional voltage signal. The control module is used for calculating electric power parameter through the sampling of the network voltage and the load current. The display module is used for displaying the electric power parameter calculated by the control module in a real-time manner. The communication module is used for transmitting electric power parameter. The peripheral storage module is used for storing the electric power parameter calculated by the control module. The switch power supply module is used for providing power supply required by the control module. The wide range electric energy metering device is advantageous in that based on the N groups of sampling vale of the voltage and the current, the electric power parameters like the effective vale of voltage, the effective value of current, active power, reactive power and others can be calculated.