PURPOSE: To provide a system laundry device which can check the current feed condition inside of a cabinet without opening the door and in which a fan is operated at all times when the drying machine is in operation.

CONSTITUTION: A washing machine and a drying machine are accommodated in the lower and upper parts of a system laundry device, which is furnished with a fan located in the upper part of a cabinet, a switch 11 in connection with a power outlet 10 for the drying machine and another 9 for the fan, and a lamp 12 which is lighted up with putting-on of the switch 11, wherein lighting of the lamp can be checked through an opening 15 furnished at a door 5 enclosing the front of the cabinet, while the drying machine can not be put in operation unless the switch 11 is put on and the fan is in operation.