Apparatus and method for auto searching radio broadcasting channel in mobile terminal

An apparatus and a method for automatically searching a radio broadcasting channel in a mobile are provided to search available channels efficiently regardless of external variables such as region, weather, etc. when automatically searching a radio broadcasting channel. Determination values for available channels which are classified according to field strength at each step are stored(S110). The determination value, which corresponds to the strongest field strength, among the determination values is set up as a detection reference value, and a radio broadcasting channel is searched based on the determination value(S115-S130). The radio broadcasting channels of which available channel determination values is larger than the search reference value are determined as available channels(S160). The number of the determined available channels is lower than the previously setup number, the available channel determination value which corresponds to the lower field strength than the currently setup reference value is a search reference value, and a search process and a determination process are repeated based on the search reference value(S170-S190).