An image processing apparatus controls a fixing temperature of a fixing device which fixes an image to be formed. The apparatus obtains an attribute of each page included in a print job including a plurality of pages. Then, the apparatus controls a fixing temperature for each page, based on a change of the obtained attribute by the obtaining unit between continuous pages. In a case where there is a change of a printing mode between the continuous pages, the apparatus sets a fixing temperature of a preceding page according to the change close to a fixing temperature of a following page.