Intelligent card energy saving protective electric meter

The utility model relates to an electric measuring instrument, and an intelligent card energy saving protective electric meter of the utility model comprises a standard electric meter, an optocoupler, a 89C51 single chip computer, an IC card base and a power circuit of the single chip computer. The optocoupler is adopted to receive electric quantity signals of the standard electric meter, and the signals are input to the 89C51 single chip computer, and the prepayment electric quantity stored in the IC card base is cut down by the 89C51 single chip computer. This intelligent card energy saving protective electric meter also adopts the administration that the electricity consumption is charged high in peak and the electricity consumption is charged low in off peak, and the intelligent card energy saving protective electric meter is provided with the energy saving function. The intelligent card energy saving protective electric meter is also provided with a high frequency filter, a pressure-sensitive device, a current sensor and a non contact relay. The intelligent card energy saving protective electric meter can proceed protective power down to the overloading electricity consumption and the loading short circuit, and the high-frequency interference and the lightning interference can also be prevented.