The invention discloses a method for automatic calibration of a single-phase meter. The method comprises that a voltage-stabilized source applies standard voltage and standard current to the single-phase meter; a single chip microcomputer sends out a meter calibration signal to the single-phase meter; the single chip microcomputer obtains sampling values of the single-phase meter; and the single chip microcomputer calibrates the single-phase meter according to sampling values. The invention also discloses a system for automatic calibration of the single-phase meter. By the aid of the method and the system for automatic calibration of the single-phase meter, the standard voltage and the standard current are provided, so that the single-phase meter can be calibrated automatically, conveniently and quickly.