To enable a network printing device to receive a printing request from plural protocols.

A name/name identifier acquirement means 2 acquires the name of a request issuer, a protocol and a name identifier for identifying a requester from the print request received in a job reception means 1. Here, an access control table 3 is referred to and a name identifier judgment means 4 judges the matching of the name identifier. A name judgment means 5 judges the matching of the names. When the judgment is satisfied, an authority judgment means 6 judges authority required for executing the print request for the request issuer from the access type of an entry corresponding to the name of the request issuer of the access control table 3 and permits access with the authority. Group identification is indicated to the access control table 3, the name judgment means 5 judges whether the issuer belongs to the group or not by the designated method.