The invention discloses an electromagnetic heating system. According to the electromagnetic heating system, under the condition that an original boiler is effectively utilized, environmental protection and energy saving switching is achieved, heating equipment only needs to be connected to the original boiler without being rearranged, heating and water supplying are conducted in the water-electricity separation mode, and the water heating utilization rate is increased. The electromagnetic heating system adopts high-frequency induced current of which the variable frequency is 10-40 KHz, when the high-frequency induced current passes through coils wound around a metal body, a high-frequency magnetic field is generated in the interior, by utilizing the magnetic wire cutting effect, the iron pipe covered with the coils generates the eddy current effect, joule heat is generated, and accordingly, the quick heating purpose is achieved. In the heating process, water in a water heater is sufficiently magnetized, scale formation is avoided, regular alkali removal does not need to be conducted, the service life of an electromagnetic heating furnace is greatly prolonged, and the electromagnetic heating system can completely replace a traditional coal-fired boiler, a natural gas boiler and electric resistance heating equipment.