A colorimetric value acquisition method in a system including a printing unit, a scanner configured to acquire an RGB value by measuring an image formed by the printing unit, and a colorimetric unit configured to acquire a colorimetric value formed of an L*a*b* value or an XYZ value by measuring an image formed by the printing unit, characterized in that the system executes: first processing configured to cause the printing unit to print a first chart in which patches are rearranged in advance such that a flare level is uniform, to cause the scanner to measure all the patches of the first chart to acquire RGB values, to cause the colorimetric unit to measure all the patches to acquire colorimetric values, and to create a scanner profile by correlating the RGB values with the colorimetric values; second processing configured to cause the printing unit to print a second chart in which patches are rearranged in advance such that a flare level is uniform, to cause the scanner to measure all the patches of the second chart to acquire RGB values, and to cause the colorimetric unit to measure a part of the patches to acquire colorimetric values; third processing configured to specify an RGB value corresponding to each of the colorimetric values acquired in the second processing using the scanner profile; fourth processing configured to calculate a difference between the RGB value specified in the third processing and an RGB value of each of the part of the patches acquired in the second processing; fifth processing configured to calculate corrected RGB values corresponding to all the patches acquired in the second processing by applying the difference to RGB values of all the patches acquired in the second processing; and sixth processing configured to acquire estimated colorimetric values corresponding to all the corrected RGB values calculated in the fifth processing using the scanner profile, and to output the estimated colorimetric values for color management of the system; and seventh processing configured to create a printer profile using the estimated colorimetric value. first processing configured to cause the printing unit to print a first chart in which patches are rearranged in advance such that a flare level is uniform, to cause the scanner to measure all the patches of the first chart to acquire RGB values, to cause the colorimetric unit to measure all the patches to acquire colorimetric values, and to create a scanner profile by correlating the RGB values with the colorimetric values; second processing configured to cause the printing unit to print a second chart in which patches are rearranged in advance such that a flare level is uniform, to cause the scanner to measure all the patches of the second chart to acquire RGB values, and to cause the colorimetric unit to measure a part of the patches to acquire colorimetric values; third processing configured to specify an RGB value corresponding to each of the colorimetric values acquired in the second processing using the scanner profile; fourth processing configured to calculate a difference between the RGB value specified in the third processing and an RGB value of each of the part of the patches acquired in the second processing; fifth processing configured to calculate corrected RGB values corresponding to all the patches acquired in the second processing by applying the difference to RGB values of all the patches acquired in the second processing; and sixth processing configured to acquire estimated colorimetric values corresponding to all the corrected RGB values calculated in the fifth processing using the scanner profile, and to output the estimated colorimetric values for color management of the system; and seventh processing configured to create a printer profile using the estimated colorimetric value.