PURPOSE: To transfer data according to the priority designated for office equipment constituting a network by transferring received data to a prescribed equipment while transfer priority and reception priority of received data are designated.

CONSTITUTION: In order to allow office equipments such as a facsimile equipment 3, a copying machine 5, printers 8, 9 and personal computers 6, 7 to transfer data mutually, a network 1 tying them is prepared and a network server 4 is connected to the network 1 to manage the equipments connected to the network 1 to manage prescribed data. As a management table managing the priority of facsimile data has a priority management table for a sender, a title priority management table and a priority management table deciding the priority of facsimile data and received data are transferred to a prescribed equipment among the plural office equipments according to the transfer priority and the reception priority.