A mobile terminal, comprising: a mobile terminal main body; a wireless communication unit configured to access a wireless communication network; characterized in that the mobile terminal further comprises: a detection unit configured to detect a connectable wireless communication network and a wireless communication network currently connected through the wireless communication unit and to measure the strength of radio signals corresponding to each of the detected wireless communication networks when a preset condition is satisfied for executing a locked state in which inputting of a control command with respect to an application is limited; a display unit configured to display a locked screen, icons (210, 220, 230) each corresponding respectively to a wireless communication network detected by the detection unit and information regarding the wireless communication network currently connected and the strength of the radio signals corresponding to each of the detected wireless communication networks, in the locked state; and a controller configured to release the locked state when selecting of any one of the output icons (210, 220, 230) is detected and control the display unit to display an idle screen in order to receive a control command to use one application of a plurality of applications installed in the mobile terminal; wherein the controller is configured to control the wireless communication unit to access a wireless communication network corresponding to the selected icon, and wherein the controller is configured to release only the locked state without controlling the wireless communication unit if the wireless communication network corresponding to the selected icon is the wireless communication network currently connected. a mobile terminal main body; a wireless communication unit configured to access a wireless communication network; characterized in that the mobile terminal further comprises: a detection unit configured to detect a connectable wireless communication network and a wireless communication network currently connected through the wireless communication unit and to measure the strength of radio signals corresponding to each of the detected wireless communication networks when a preset condition is satisfied for executing a locked state in which inputting of a control command with respect to an application is limited; a display unit configured to display a locked screen, icons (210, 220, 230) each corresponding respectively to a wireless communication network detected by the detection unit and information regarding the wireless communication network currently connected and the strength of the radio signals corresponding to each of the detected wireless communication networks, in the locked state; and a controller configured to release the locked state when selecting of any one of the output icons (210, 220, 230) is detected and control the display unit to display an idle screen in order to receive a control command to use one application of a plurality of applications installed in the mobile terminal; wherein the controller is configured to control the wireless communication unit to access a wireless communication network corresponding to the selected icon, and wherein the controller is configured to release only the locked state without controlling the wireless communication unit if the wireless communication network corresponding to the selected icon is the wireless communication network currently connected. a detection unit configured to detect a connectable wireless communication network and a wireless communication network currently connected through the wireless communication unit and to measure the strength of radio signals corresponding to each of the detected wireless communication networks when a preset condition is satisfied for executing a locked state in which inputting of a control command with respect to an application is limited; a display unit configured to display a locked screen, icons (210, 220, 230) each corresponding respectively to a wireless communication network detected by the detection unit and information regarding the wireless communication network currently connected and the strength of the radio signals corresponding to each of the detected wireless communication networks, in the locked state; and a controller configured to release the locked state when selecting of any one of the output icons (210, 220, 230) is detected and control the display unit to display an idle screen in order to receive a control command to use one application of a plurality of applications installed in the mobile terminal; wherein the controller is configured to control the wireless communication unit to access a wireless communication network corresponding to the selected icon, and wherein the controller is configured to release only the locked state without controlling the wireless communication unit if the wireless communication network corresponding to the selected icon is the wireless communication network currently connected.