Document information that a user wishes to send by FAX is selected from a list of registered document information. If it is determined that a pre-set sending method flag for the selected document information is set to bundled transmission, drawing information generated by each application is converted into common document information. Further, after the converted common document information is merged into a single piece of information, drawing information to be converted via a FAX driver of the document information that the user wishes to send is sent to an image processing apparatus as a single job.