A method is provided for receiving a Digital Multimedia Broadcasting (DMB) signal by a mobile terminal in a DMB system including a satellite for transmitting a satellite DMB signal directly to the mobile terminal, a gap filler for repeating the satellite DMB signal received from the satellite and transmitting a terrestrial DMB signal to the mobile terminal, and the mobile terminal capable of receiving both the satellite DMB signal and the terrestrial DMB signal. The method includes receiving at least one DMB signal; determining if there is a satellite DMB signal among the at least one DMB signal; if there is the satellite DMB signal calculating a reception frequency of the satellite DMB signal for a stated time; and if the reception frequency is less than or equal to a threshold providing a user with a message recommending detachment of an antenna used for receiving the satellite DMB signal.