provided is an image forming apparatus including : an image forming unit configured to receive print data and to form an image corresponding to the print data on a recorded material ; a display unit configured to receive display data and to display a video corresponding to the display data ; and a control unit configured to execute an image forming operation for outputting the print data with respect to the image forming unit and a display operation for periodically outputting the display data with respect to the display unit at a predetermined frame rate , wherein the control unit changes the frame rate according to a progress status of the image forming operation .