PURPOSE: To prevent the washing operation from being executed, when a washing button is pushed erroneously, when a person does not go into a bathtub at all after washing the bathtub and it is unnecessary to wash the bathtub by filling the bathtub with water or hot water by a hot water/water supply means, and thereafter, monitoring and storing whether bathing into the bathtub is executed or not, based on a water level detecting means of a water level detecting means.

CONSTITUTION: When a full automatic button 46 is turned on again in the course of operation of a washing system, control of a bathtub washing start operation is executed. First of all, whether bathing into a bathtub 1 is executed or not after washing the bathtub of the previous full automatic operation is decided. This decision is executed by whether it is stored in a memory that bathing into the bathtub is executed or not. When bathing into the bathtub is executed even once, an operation which reaches warming through filling of hot water and additional heating from washing of the bathtub is executed. When bathing into the bathtub is not executed, whether T7 time of a set time elapses after the previous full automatic operation time or not is decided. When the T7 time does not elapse after the previous full automatic operation time, confirmation for whether the washing operation is started or not is urged. As for this confirmation for whether washing is executed or not, for instance, by displaying a message on a washing confirmation display part 38 of a remote control 45, or providing a buzzer on the remote control 45, and sounding this buzzer, confirmation for whether the washing operation is started or not is urged.