is connected with the first water supplying tube 81 of a water retaining unit 81 and a cleaning spray nozzle 33 of the control unit 3 is connected with the second water supplying tube 82 thus water tubes and electrical wires required for connecting the toilet seat 2 and the control unit 3 to the septic tank 7 the water retaining unit 8 and the power socket 61 are hidden at back of the carrying unit 1 so that the present invention is easily assembled and obtains beauty when a user wants to use the toilet seat 2 and walks near a sensor 51 on a cover 5 senses the user in a default distance in advance then the sensor 51 automatically turns on a moving unit 35 to open the cover 5 a heater 32 is set up through a control panel 31 at the time so that a temperature of a transmittal unit 41 in the seat 4 is controlled through the water supplied from the second water supplying tube 82 to provide a comfort when sitting on the seat 4 when the user finishes using the toilet a cleaning spray nozzle 33 is turned on through the control panel 31 to spray a water of a certain temperature for washing the user moreover an automatic flushing or a manual flushing is set through the control panel 31 if an.