The invention provides a solar facula repairing method of an all-sky nephogram. The solar facula repairing method comprises the following steps: positioning a solar facula of the all-sky nephogram; calculating a solar facula threshold value factor to remove the solar facula; and repairing an area corresponding to the solar facula by a bilinear interpolation method. The solar facula repairing method of the all-sky nephogram exhibits good universality and can favorably repair the solar facula of the all-sky nephogram.