product next referring to fig5 a method of a power supply for a washing machine and a dryer according to the present invention will be described first the method includes a first step s 1 in which a current limit value and each optimal performance current of the washing machine and a dryer are set in micoms each provided in the washing machine and the dryer the current limit value is a maximum value used in the two products 1 and 2 when the two products 1 and 2 are operated simultaneously and a value set for the two products to be operated safely also each optimal performance current is a current value designed for each product to perform its optimal efficiency each optimal performance current value should be in a range of the current limit value next a second step s 2 is included in which operation information of the washing machine and the dryer is exchanged and communicated by using communication ports connected each other provided in each micom the operation information is a signal showing whether the washing machine or the dryer is operated or not next a third step is included in that currents are supplied in a range of the current.