The utility model relates to an electric power detects technical field, especially relates to a device is checied to family table, including host computer, first extension and second extension, the host computer connection is held at batch meter electric supply meter for receive the pulse current signal that first extension sent, and send the power line carrier signals who contains electric tablenumber information to first extension, and under the ammeter that is used for corresponding the shortwave frequency modulation signal injection who contains current electric table number information,it is terminal that first extension inserts the indoor transmission of electricity circuit of user for through the transmission of electricity circuit to the host sends pulse current signal, and receive host sends's power line carrier signals through the transmission of electricity circuit, the second extension for detect the shortwave frequency modulated(FM) signal outside with door, and confirmthe user that the ammeter corresponded of current electric table number according to the intensity of shortwave frequency modulated(FM) signal. The utility model discloses a device is checied to family table can realize single operation at the in -process of checking, the degree of accuracy is high and save time, laborsaving.