equipped in the drum dryer 100 and cabinet dryer 200 respectively it is preferred that the two controllers 400 be connected by a data cable not shown for information transfer therebetween meanwhile the controller 400 may be configured to control the drum dryer 100 and cabinet dryer 200 in an independent manner or in a linked manner hereinafter the drying operation and functions of the cabinet dryer equipped with the foldable shelves in accordance with the exemplary embodiment of the present invention will be described first laundry is laid on the foldable shelves 300 or is hung on the hanger bar 221 in the body 210 of the cabinet dryer 200 thereafter electric power is supplied to the hot air supplier 130 thereby causing hot air to be supplied to the second air supply duct 122 of the hot air supply duct subsequently the valve 125 is controlled to guide the hot air flowing through the second air supply duct 122 into the hot air introduction duct 241 of the cabinet dryer 200 in this case a part of the hot air flowing through the hot air introduction duct 241 is introduced into the body 210 of the cabinet dryer 200 through the hot air outlets 241 a and the remaining part of the hot air is introduced into the fixing pipes 330 of the foldable shelves 300 the hot air introduced.