The image forming apparatus, for printing print data, and a printing control apparatus, for controlling a printing operation of the image forming apparatus, are connected through a network. In the printing control apparatus, there are provided an authentication means that authenticates a user of the image forming apparatus, a discriminating means that discriminates whether print data for which the printing is instructed by the authenticated user is for public business or for private business, a recording means that records information relating to printing of print data as private business information corresponding to the user when the print data are discriminated by the discriminating means to be for private business and a charging means that charges for private business printing of the user based on the private business information recorded on the recording means.