PURPOSE: To make it possible to output data by an output request from a specific output requester.

CONSTITUTION: A printer device receiving a print command and output data from a host device 1 allocates an optional ID command to the received data, emulates the data by an emulation part 6, stores the emulated data in a storage means 7, and then returns the ID number data to the host device 1. The host device 1 displays the received ID number on a console to inform it to an output requester. When the requester inputs the ID number front an ID input means 4, a data reading means 5 reads out data allocated to the inputted ID number from the means 7, a data developing part 8 develops the data and an output part 9 outputs the developed data.