A printing control system includes: operation means configured to enter a first printing condition including information on the number of page images to be printed on one printing sheet and the total number of page images to be printed; display means; and control means. The control means compare ratios of reduction in the usage of printing sheets provided by the one or more second printing conditions to a preset threshold value, and sets the first printing condition as the final printing condition when the ratios of reduction in the usage of printing sheets provided by the one or more second printing conditions are less than the threshold value while causing the display means to display the one or more second printing conditions when the ratios of reduction in the usage of printing sheets provided by the one or more second printing conditions are not less than the threshold value.