In a cell selecting system and a method thereof in a radio communication network, a forward BCCH is constructed to contain, in each time slot of a frame, both a FCCH bit pattern and a SCH bit pattern. The method includes measuring the reception power of a forward BCCH transmitted from each cell, while detecting a FCCH bit pattern and a SCH bit pattern from a time slot of the forward BCCH and demodulating the detected bit patterns. The cell synchronization can be performed by using the demodulated information of the selected cell. Accordingly, the cell selection time and the processing load of the mobile terminal can be reduced.