An auditing system including an image forming apparatus and an image processing server for receiving and storing job history information of a job executed by the image forming apparatus, the auditing system comprising: setting means for setting page filtering conditions to the image forming apparatus, and storing means for storing, in the image forming apparatus, job history information of a job executed by the image forming apparatus, characterized in that the page filtering conditions can include a ratio of a number of pages to be acquired as image data to all pages included in a job, and the image forming apparatus comprises: acquisition means configured to acquire image data corresponding to pages included in the job history information stored in the storing means, and to transfer, if the page filtering conditions include the ratio, the acquired image data of a number of pages corresponding to the ratio as the job history information to the image processing server, and deletion means configured to delete the job history information which has been successfully transferred to the image processing server, wherein the image data which is transferred to the image processing server as the job history information if the page filtering conditions include the ratio is image data corresponding to a page randomly determined from among the pages included in the job history information stored in the storing means. setting means for setting page filtering conditions to the image forming apparatus, and storing means for storing, in the image forming apparatus, job history information of a job executed by the image forming apparatus, characterized in that the page filtering conditions can include a ratio of a number of pages to be acquired as image data to all pages included in a job, and the image forming apparatus comprises: acquisition means configured to acquire image data corresponding to pages included in the job history information stored in the storing means, and to transfer, if the page filtering conditions include the ratio, the acquired image data of a number of pages corresponding to the ratio as the job history information to the image processing server, and deletion means configured to delete the job history information which has been successfully transferred to the image processing server, wherein the image data which is transferred to the image processing server as the job history information if the page filtering conditions include the ratio is image data corresponding to a page randomly determined from among the pages included in the job history information stored in the storing means. acquisition means configured to acquire image data corresponding to pages included in the job history information stored in the storing means, and to transfer, if the page filtering conditions include the ratio, the acquired image data of a number of pages corresponding to the ratio as the job history information to the image processing server, and deletion means configured to delete the job history information which has been successfully transferred to the image processing server, wherein the image data which is transferred to the image processing server as the job history information if the page filtering conditions include the ratio is image data corresponding to a page randomly determined from among the pages included in the job history information stored in the storing means.