To provide a network device capable of efficiently and centralizedly performing charging management to respective users using peripheral equipment on a network altogether for the respective users or groups even in the network of a large scale.

When printing output in a printer 103 is performed from a client 101(a), this network device 102(a) calculates a charge for data output for the respective users or the groups from the user name of the client 101(a), output destination information (the information of the using sheet number of A4 and B4 and the using time of a public line 105, etc.), informed from the printer 103 and respective accounting units (A4: 5 yen/sheet, B4: 10 yen/sheet, the public line 105: 10 yen/minute) and holds the result (accounting information).