To unnecessitate the exchange of a water supply valve into a low water pressure water supply valve even in the case of a water supply abnormality by changing a judgement water level and a judgement time for judging the water supply abnormality at the time of next time washing when the water supply abnormality occurs in the midst of the execution of a washing process.

It is judged whether or not a time required for supplying water till a low water level scale 16L being a judgement water level inside a washing and drying tub 16 in order to detect the water pressure of water service. When the time is longer than the judgement time, the water supply abnormality is reported since the state is the abnormality detecting one. After the report of the water supply abnormality, contents which are programmed in a control part 5 from the beginning are changed, that is, the judgement time being a judgement standard for detecting the abnormality is rewritten. Then, an operation panel 6 is operated for executing next time washing and the process is started so that the changed program contents are corrected and set. Then, the washing process by the corrected and set program contents is executed.