The utility model relates to a power consumption inquiry system field discloses a domestic electric information interaction inquiry system, including the host computer terminal, from quick -witted terminal and smart electric meter, one or many quick -witted terminals of follow of a host computer terminal connection, the quick -witted terminal connection one or more smart electric meter of follow, all be equipped with the RS485 interface from the quick -witted terminal with on the smart electric meter, it carries out data transmission from quick -witted terminal with smart electric meter to make through the RS485 interface, host computer terminal and the quick -witted terminal of follow all are equipped with the electric power carrier wave communication port, make the host computer terminal and carry out communication of each other from quick -witted terminal through the electric power carrier wave communication port, be equipped with the LCD touch -sensitive screen on the host computer terminal, be used for the inquiry to show power consumption information, arrearage information, purchase payment information and be used for providing user input information. The utility model discloses make things convenient for the user to manage a plurality of household electrical appliances, also reduced use cost. Through this system can be to the electric information inquiry of family expenses, point out and pay, the person of facilitating the use manages tame power consumption.