Message service support method and portable device using the same

PURPOSE: A message service providing method and a portable terminal supporting the same are provided to supply a fast and easily accessible message service function. CONSTITUTION: An input unit(120) includes at least one between a keypad and a key map. The keypad generates a key input signal. The key map generates a key input signal according to a touch event. A control unit(160) controls the display unit(150) to print a message writing window set along an application program environment which is presently activated according to the generation of the key input signal. A storage unit(170) stores the application program and the key map.