A mobile terminal, comprising: a camera configured to receive an image: a display unit configured to display the image received via the camera; and a controller configured to perform a first user authentication based on a plurality of preset face elements among face elements included in a first face image when the first face image including the plurality of preset face elements is received via the camera, and perform a second user authentication based on at least one face element included in a second face image when the second face image lacking at least one of the plurality of preset face elements included in the first face image is received via the camera, characterized in that the controller is further configured to: control the display unit to display a locked screen indicating a locked state of the display unit before performing the first user authentication or the second user authentication, unlock the locked state of the display unit and control the display unit to display an execution screen of a first application corresponding to the first user authentication in response to the performed first user authentication, and unlock the locked state of the display unit and control the display unit to display an execution screen of a second application corresponding to the second user authentication in response to the performed second user authentication. a camera configured to receive an image: a display unit configured to display the image received via the camera; and a controller configured to perform a first user authentication based on a plurality of preset face elements among face elements included in a first face image when the first face image including the plurality of preset face elements is received via the camera, and perform a second user authentication based on at least one face element included in a second face image when the second face image lacking at least one of the plurality of preset face elements included in the first face image is received via the camera, a display unit configured to display the image received via the camera; and a controller configured to perform a first user authentication based on a plurality of preset face elements among face elements included in a first face image when the first face image including the plurality of preset face elements is received via the camera, and perform a second user authentication based on at least one face element included in a second face image when the second face image lacking at least one of the plurality of preset face elements included in the first face image is received via the camera, control the display unit to display a locked screen indicating a locked state of the display unit before performing the first user authentication or the second user authentication, unlock the locked state of the display unit and control the display unit to display an execution screen of a first application corresponding to the first user authentication in response to the performed first user authentication, and unlock the locked state of the display unit and control the display unit to display an execution screen of a second application corresponding to the second user authentication in response to the performed second user authentication.