To efficiently perform forming of a desired image when forming of an image is requested even in case where a residual amount of a consumable such as ink or toner is deficient.

This image forming apparatus 1 includes a residual ink amount detecting section 1063 for detecting a residual amount of one or more kinds of consumables to be used in forming of an image; a main control section 111 for determining whether or not a residual amount of at least one kind of consumable is deficient on the basis of the detection result; an image processing section 114 that generates image plotting information by using a substitute format which is different from a format to be used in a normal image forming process, is defined in advance and corresponds to a main usage of a user in case where the residual amount of the consumable is deficient and a command for forming an image from the user is received; and a print engine 106 for performing an image forming process on the basis of the image plotting information.