The present invention relates to a broadcast editing apparatus and method for editing a satellite broadcast signal in a mobile terminal of a wireless communication system. A satellite broadcast signal received from a satellite or a gap filter is divided into a video signal and an audio signal. An inputted user's voice or sound effect is either multiplexed with the separated video signal or integrated with the separated audio signal. The integrated audio signal and the separated video signal may be multiplexed to edit a satellite broadcast. The edited satellite broadcast may be stored to be reproduced at anytime by the user. Accordingly, the user can edit and appreciate the satellite broadcast according to his preference. Also, an audio signal may be transmitted to another person by being inserted into a satellite broadcast through a multimedia message service.