After conventional tap water purification equipment, especially a water purifier with a ceramic filter element, is used for a period of time, a variety of impurities in the water are deposited on the surface of the filter element and in pores, resulting in poor water flow and reduced filtration capacity, so regular artificial cleaning needs to be conducted to restore normal water flow and filtration capacity; and the quality of drinking water for users is greatly affected. For conventional water purification equipment with the ceramic filter element, cutting off the water needs to be conducted, the machine is manually disassembled, and the filter element is taken out to be cleaned. The cleaning method is mainly based on artificial mechanical cleaning, which is time-consuming, labor-intensive and not thorough. In order to solve the problems that the existing water purification equipment can not be automatically cleaned and the safety of drinking water for the users can not be continuously guaranteed, the invention provides an intelligent self-cleaning ceramic water purifier. The water purifier can monitor the degree of use of the ceramic filter element inside the machine by itself. When the filter element needs to be cleaned, the period of using water by the users at extremely low frequency is intelligently selected and ultrasonic cavitation is used to clean the inside and outside and pores of the ceramic filter element.