1. A color image data correcting method for producing a color correction table for correcting multiple gradation color image data in order to correct color drifts in the printed results by printing devices and for correcting the color image data by means of the color correction table, the method comprising: a step wherein predetermined color patches are printed on the basis of the patch image data for printing a plurality of patches of which the color gradation values have been changed for each color of each color material for recording used in the printing devices; a step wherein the color values of the color patches are acquired by measuring the color of the printed color patches; a step wherein the color values corresponding to all the color gradation values of the color correction table are interpolated by referring the color values acquired and by using the predetermined function, and are acquired; and a step wherein the color values corresponding to all the color gradation values acquired by the interpolation and the standard values that are the color values of the standard printed results are contrasted, and on the basis of the contrast result, a color correcting table is produced for correcting the color image data in such a way that printed results equivalent to the standard printed results corresponding to the color image data of any color gradation values may be acquired by the printing devices.