Method for inputting memo in touch screen terminal and device thereof

A method inputs a memo in a touch screen terminal. The method includes determining whether a memo function is requested while displaying contents of a specific function on a screen, upon receiving the request of the memo function, displaying a memo window that is transparently or translucently overlaid on the screen on which the contents of the specific function are displayed and that supports free drawing, and detecting an input of the contents onto the memo window and storing the contents displayed on the screen upon receiving a request for storing the contents at a later time.