The invention discloses a scale-free and radiation-free technology of an intelligent electromagnetic energy water heater. Heating is carried out in a high-frequency electromagnetic induction manner, and electricity is saved by 1/4 or near 1/3 compared with a common electric heating tube water heater. As heating coils are not in contact with water, the combustible-gas inflammable possibility, the combustible gas explosive possibility and the carbon monoxide poisoning possibility can be avoided, and therefore safety is quite high. After several years of long-term experimenting, the working frequency and the waveform of the water heater are changed, and scale is effectively eliminated; the water temperature can be controlled to the accurate temperature with the temperature error of +/-0.5 DEG C through the PID adjustment technology and the self-adaptive technology; multiple intelligent technologies such as various intelligent functions including WiFi, voices, a Bluetooth network, a wireless panel and the like are adopted; the water-cooling cooling technology of a water inlet tank is used, and therefore stable work of a high-power electronic device is guaranteed; and a shell is made of a flame-retardant and insulating material, the interior is made of an anti-radiation material, the resistance-capacitance absorption technology is adopted for the interior, and the electromagnetic radiation value is reduced to be zero. The electromagnetic-energy, radiation-free and scale-free technology is suitable for water heaters, induction cookers, water dispensers, winter heating and the like, and can be further applied to hospitals, touring, civil boilers and industrial boilers, and the market is quite large.