A method for controlling a portable device comprising a first body in the center thereof, a second body positioned on the left side of the first body and a third body positioned on the right side of the first body, according to one embodiment of the present specification, may comprise the steps of; detecting a first triggering signal if a first faulted state is converted to a second faulted state; displaying a menu interface in the converted second faulted state on the basis of the detected first triggering signal; detecting a first control input with respect to the displayed menu interface; and if the second faulted state is converted to a third faulted state, displaying a first application in the third faulted state on the basis of the first control input.