A water dispenser comprises a water dispenser body, a smart seat and a water dispenser bucket. The smart seat is arranged on the upper portion of the water dispenser body, the water dispenser bucket is arranged above the smart seat, a water incoming
pipe is arranged at the bottom of the smart seat and penetrates an
ozone sterilizer to be connected with a cold water tank, a bottom pipeline of the cold water tank is connected with a hot water tank, a
water level valve is arranged in the hot water tank, an
electromagnetic coil is arranged at the bottom of the hot water tank and connected with a
temperature control switch A through a lead, the hot water tank comprises an electrothermal film, a heat insulating layer and a warmth keeping layer sequentially from inside to outside, and the electrothermal film is connected with a
temperature control switch B through a lead. By the water dispenser, repeated boiling of boiling water is prevented effectively, so that cancerigenic consequence caused by increasing of
nitrite due to the fact that water is boiled repeatedly is avoided, and people can drink healthier water; temperature of water which is not poured out can be maintained at 40 DEG C through the electrothermal film, so that
water temperature can be guaranteed; cold water is sterilized through the
ozone sterilizer, so that the problem that
bacteria exceed standard when the cold water is drunk directly is avoided.