A method of controlling temperature of a fuser of an image forming
apparatus includes measuring the temperature of the fuser, comparing the
measured temperature with a previously measured temperature and
determining whether the temperature of the fuser is ascending or
descending to differentiate a temperature ascending stage and a
temperature descending stage from each other, and controlling a chopping
rate of the switching unit that intermittently connects power to the
fuser. Reducing unnecessary power consumption is possible because the
temperature of the fuser is controlled by differentiating a temperature
ascending stage and a temperature descending stage from each other, and
the quality of image may be enhanced and a flicker phenomenon is
prevented.