A watch-type mobile terminal includes: a terminal body; a sensor unit disposed on one surface of the terminal body, configured to determine whether the watch-type mobile terminal has been worn or not, and including a light emitting portion for emitting light of a first intensity at first time intervals, and a light receiving portion for sensing reflected light; and a controller configured to control the light emitting portion to emit light of a second intensity at second time intervals between the first time intervals, wherein the controller calculates a pressure value applied to the terminal body based on an optical amount of light incident onto the light receiving portion, and generates a specific control command based on the pressure value.