To provide a printer command control apparatus, method and system that can prevent control commands from being sent erroneously to a printer connected to a printer command control apparatus, a printer connected to the printer command control apparatus, and a program and a storage medium. In the printer command control system, a NonPC apparatus is connected to a printer and, at the same time, connected to a web server via the Internet. A tag to be sent from the NonPC apparatus to the printer is constituted by a printer maintenance command header, which consists of a header ID and a manufacturer ID including information indicating to which manufacturer a command is adapted, and a printer maintenance command. When manufacturer information of the manufacturer ID and manufacturer information of the printer do not coincide with each other, the printer maintenance command is controlled not to be sent to the printer.