Mobile terminal and system scan method thereof

A mobile terminal and a system scan method thereof are provided to effectively obtain system information by using receiving signal strength. If power is applied to a mobile communication terminal, an RSSI(Received Signal Strength Indication) with regard to all channels of a PRL(Preferred Roaming List) is checked(S51). A list of the RSSI is made through channels having strength stronger than predetermined signal strength(S53). Full scan with regard to all channels of the list of the RSSI is performed(S55). If system information is not obtained during the scan process, a power saving mode is performed(S61). The scan process and power saving process are alternatively progressed until the system information is obtained(S65).