A method for operating a soft keyboard of a touch device is disclosed, the touch device including a touch screen and a processor, the touch screen being coupled to the processor, and the method including: the processor determining a touch signal generated from a single touch point applied onto a trigger region for the soft keyboard; the processor determining a drag signal generated through move of the single touch point from inside of the trigger region to outside of the trigger region; the processor determining a starting point and an end point of the drag signal, to generate a soft keyboard display signal; and displaying the soft keyboard on the touch screen according to the soft keyboard display signal.