an ordinary toilet cover and has a bulge portion 11 having several hot air outlets 111 and water ejection holes 112 the bulge portion 11 is connected with a circuit box 12 and a cleaner box 13 the toilet seat 2 as shown in fig2 has two support fixtures 21 an axle 22 pivotally coupled to the support fixtures 21 and a gear 221 connected at one end of the axle 22 the pedal switch 3 has a pedal 31 a spring 32 having one end connected with the pedal 31 and the other end connected with a switch 33 a detector 4 disposed on cover 1 has a sensor 42 which uses infrared rays to determine if the seat 2 is occupied and is covered in a case 41 a water pump 5 is installed in the bottom of the cleaner box 13 and has a blade 51 at its front end connected with both the water inlet pipe 52 and the outlet pipe 54 to pump water for cleaning the seat 2 the water inlet pipe 52 goes into a water barrel 53 which is located in the toilet tank and is lower than the water line of the tank for supplying water to be mixed with a cleaning solution the water outlet pipe 54 has a universal joint at its front end that is connected to the cleaning liquid outlet pipe 55 the cleaning liquid is provided.