An image processing apparatus includes an interpolation unit (205, S708) which interpolates, based on the result of forming an image when executing calibration and the result of forming an image after executing calibration, the fluctuation amount of the image quality of each of image forming devices capable of outputting image data, a calculation unit (205, S710) which calculates, for each of the image forming devices on the basis of the interpolation result, the fluctuation amount of the image quality for image data to be output, a determination unit (205, S711) which determines the priority order of the image forming devices as output destinations of the image data on the basis of calculation results, and a display unit (205, S712) which displays a list of image forming devices selectable from the image forming devices in accordance with the determined priority order.