According to the embodiments, there is provided an image forming apparatus and an image erasing apparatus. The image forming apparatus forms, on a recording medium, an image showing the color material information about the erasing temperatures of a plurality of erasable color materials used for forming an image to be printed together with the image to be printed. The image erasing apparatus heats the plurality of erasable color materials to the highest erasing temperature or higher in the different erasing temperatures of the erasable color materials forming the image printed on the recording medium in order to erase the erasable color materials forming the image.