Provided is an image processing method, the method including heating a thermoreversible recording medium with laser beams to erase an image which has been recorded on the thermoreversible recording medium, the thermoreversible recording medium reversibly changing between a colored state and a decolored state depending on a heating temperature and a cooling time; heating the thermoreversible recording medium, on which the image has been erased, with the laser beams to record a subsequent image on the thermoreversible recording medium; and measuring at least one of a surface temperature of the thermoreversible recording medium and a recording environmental temperature after a completion of erasing the image but before a beginning of recording the subsequent image to obtain a measured temperature value and controlling a time interval between the completion of erasing the image and the beginning of recording the subsequent image depending on the measured temperature value.