PURPOSE: To prevent washing shortage, uneven washing, overwashing, etc., by detecting incessantly a state of the washing in a washing and dehydrating tank, and to prevent rinsing shortage and uneven rinsing by detecting a fact that cloth stickes to the tank at the time of intermediate dehydration, and peeling off the cloth.

CONSTITUTION: Not only control of an operation program by detecting the speed of revolution of a pulsator 5 in the beginning of the operation, but also recontrol by detecting the speed of revolution of the pulsator 5 in the course of the subsequent operation are executed. Also, in the rinsing process, as well, the state of stick of cloth to a washing and dehydrating tank 3 is judged by detecting the speed of revolution of the pulsator 5 and a cloth peeling-off operation is repeated until cloth peeling-off is confirmed.