The invention discloses a radiation immunity electromagnetic compatibility test system applicable to high voltage metering equipment and a radiation immunity electromagnetic compatibility test method. The system comprises a host computer, a router, and an emission antenna and the high voltage metering equipment which are arranged in an electric wave darkroom and further comprises a high voltage output system and a radiation immunity test system which are connected in parallel in a wireless mode between the router and the high voltage metering equipment, the high voltage output system comprises a signal generator, a voltage and current stabilizer, a voltage and current booster and a calibration system which are sequentially connected, an output end of the voltage and current booster is connected with an input end of the high voltage metering equipment, an output end of the high voltage metering equipment is connected with the calibration system, the radiation immunity test system comprises a signal source, a power amplifier, a power meter and a radio frequency switch which are sequentially connected, and an output end of the radio frequency switch is connected with another input end of the high voltage metering equipment through the emission antenna. The radiation immunity electromagnetic compatibility test system is advantaged in that accuracy and reliability of the high voltage metering equipment are improved, and stable operation of a power grid is guaranteed.