A multimedia device of a vehicle may include: a broadcast receiver configured to receive broadcast information of a plurality of channels from a radio signal; a controller configured to divide the received broadcast information into sound information and subtitle information, and to simultaneously output the sound and subtitle information; a sound outputter configured to output the divided sound information; and a display configured to display the divided subtitle information. The controller is further configured to determine electronic program guide (EPG) information of the radio signal, and to control the display so as to display a text-changeable channel according to the EPG information.