The invention discloses a temperature drift and time drift real-time difference compensation method for an electric-field sensor. The method includes the following steps: (1) the electric-field sensor includes at least one electric-field measurement unit and at least one electric-field reference unit. The reference unit is used for compensating for the temperature drift and time drift of the electric-field sensor. (2) the compensation is performed mainly through performing difference on output signals of the electric-field measurement unit and output signals of the electric-field reference unit to calculate difference output of the electric-field sensor; (3) according to the difference output and calibration parameters of the electric-field sensor, the intensity of a tested electric field is calculated. The temperature drift and time drift real-time difference compensation method for the electric-field sensor aims at solving a key problem of temperature drift and time drift caused by temperature in the practical application of an electric-field sensor. Therefore, a drift real-time compensation method which is effective and convenient to use is provided.