Detection drainage control method and system, storage medium, device and dish washing machine

The control method for detecting drainage of the dish-washing machine comprises the following steps: acquiring an idle power value P0 of a drainage pump of the dish-washing machine during no-water idle running; presetting a variable range of a power variable delta W; obtaining an operation power value P1 of the dish-washing machine after the drainage stage is completed; according to the operation power value P1 and the idle power value P0, the power variable delta W = P1-P0 is obtained through calculation; judging whether the power variable delta W falls into a variable range or not to obtain a judgment result of qualified drainage or unqualified drainage; according to the judgment result, the dish-washing machine is controlled to make a signal of continuous work or abnormal alarm. The purpose of detecting whether water is drained or not is achieved by detecting the power difference value of the draining pump of the dish washing machine, the situation of water drainage is detected by judging the power variabl