The invention provides a data output system which can control a printer in accordance with the position of a user without providing a mobile terminal and the printer with special devices, which can reduce the processing load on the mobile terminal, which can ensure the convenience of the user when using the printer, and which avoids inconvenience as a result of incorrect settings by the user. The invention can include a print control terminal that obtains mobile terminal position information from a relay station. When the distance between the mobile terminal position specified by the obtained mobile terminal position information and the printer position specified by printer position information from a storage device is less than a predetermined value, a print command and corresponding print data are transmitted to a printer PR in response to a request from a mobile terminal.