A mobile terminal that has a display unit separable from a main unit and a method thereof are provided. The main unit includes a first separation sensor for sensing separation of the display unit; a radio frequency (RF) transmission unit for wirelessly transmitting data to be output to the display unit by radio; and a main unit controller for setting a path of the data to be output to the display unit to the RF transmission unit if the separation of the display unit is sensed by the first separation sensor. The display unit includes a second separation sensor for sensing separation from the main unit; an RF receiver unit for receiving data transmitted wirelessly from the RF transmission unit; a display controller for setting a path of the data input to the display unit to the RF receiver unit if the separation from the main unit is sensed by the second separation sensor; a memory for storing the data received by the RF receiver unit; and a display module for displaying the data stored in the memory.