The invention provides a high-frequency impulse magnet field low-temperature sterilization method and device on an electromagnetic hot water and electromagnetic drinking water system. The method and the device are high in work efficiency and good in sterilization effect. The device comprises a heating body coiled with a spiral coil on the outer surface, a water inlet and a water outlet formed in the heating body, a Hall water flow sensor, a water inlet temperature sensor and a water outlet temperature sensor which are arranged on the water inlet and the water outlet respectively, a power output module connected with the heating body, a current sensor module arranged between the heating body and the power output module, a driving control module for controlling the action of the power output module and a power supply, wherein the driving control module is electrically connected with the Hall water flow sensor, the water outlet temperature sensor and the current sensor respectively. Through the scheme, low-temperature sterilization is performed on the using manner of domestic water by adopting a pulsed magnet field, so that the whole sterilization system has the advantages of low power consumption, short sterilization time, high killing capacity for microorganisms and good sterilizing effect.