A control method for a laundry treating apparatus comprises a course setup step of inputting a washing course through a washing machine interface provided to receive a control command; a first communication step of transmitting the washing course to a dryer by a washing machine if a control command requesting recommendation of a drying course is input through the washing machine interface; and an interface power supply step of supplying a power to a dryer interface provided to receive a control command if the dryer receives information on the washing course.