Hydrogen cooled water heater

The present invention relates to a hydrogen cooled water heater, water-cooling the hydrogen water heater comprising: a body, to store and supply a predetermined amount of raw water from the upper portion of the tub; electrolysis part provided in said body, generating a predetermined amount of hydrogen, and hydrogen-containing the water in the reservoir; and a power supply unit, the AC power into DC power supplied to the electrolytic unit.