A method of transmitting printer information which can inform a host of changed printer information in real time whenever printer information changes and a network printer using the method. The method includes determining whether or not the printer information has changed and transmitting the changed printer information in real time to a communications network or a predetermined program which communicates with the network printer. The network printer includes a printer information change determination circuit which determines changes in printer information, and a changed information notification module which transmits in real time the changed printer information to a communications network or a predetermined program which communicates with the network printer. The changed information notification module transmits the printer information to the communications network or the predetermined program when the network printer is turned on.