To obtain the comfort of using a heater toilet seat and a sanitary toilet cleaning device significantly by mitigating the coldness felt by a user in using the toilet seat or the cleaning device in the energy saving mode.

When the energy saving mode is started, the energy saving operation is started with a target temperature of 26°C as the room temperature at the time is 10°C or higher. Then the room temperature is gradually lowering after that to be lower than 10°C, when the target temperature in the energy saving operation is reset at a higher temperature as 30°C. When the energy saving mode is released, the operation returns to the normal operation, and the target temperature is reset again at 40°C.