Provided is a mobile terminal characterized by comprising: a display unit which outputs visual information; a depth camera which captures a subject and acquires a depth image; a memory which stores a vein pattern of a user's hand; and a control unit connected to the display unit, the depth camera, and the memory. The control unit identifies the shape of the user's hand from the depth image, authenticates the user using a pre-stored user vein pattern, and when the user is authenticated, executes a specific application in response to a three-dimensional gesture of the user's hand, and omits an authentication procedure required by the specific application.