To improve the added value of a dwelling with common use facilities by receiving a transmitted facility number and dweller's number and transmitting operating state information of a shared equipment corresponding to the equipment number on a message display means in the room of the dweller's number so as to quicken the efficient use of the shared equipment.

A centralized controller 10 compares the dweller's number, an equipment number identifying command, information on the dweller's number inputted in advance of it and operating state information showing that washing machines 3a to 3d are in the middle of operation to recognize which dweller completes the operation of which washing machine 3a to 3d through the use of which washing machine 3a to 3d. Then the centralized controller 10 gives information to IFU 2 installed in the room 11. At the time of receiving operation completion information of the washing machine 3a to 3d, the IFU 2 transfers this information to a message display 16, which displays the completion of washing by the washing machine 3a to 3d based on this information. Thereby the dweller of the room 11 knows the completion of washing.