An electronic device, comprising: a display unit; and a controller configured to: detect whether the electronic device is connected with a head mounted wearable device; control the electronic device to operate in a virtual reality mode, when the electronic device is connected with the head mounted wearable device; control the display unit to display two screen images (1020a, 1020b) corresponding to a user's eyes on a screen in response to operating in the virtual reality mode; determine an occurrence of at least one event related to running at least one application in the electronic device while the two screen images (1020a, 1020b) are displayed in the virtual reality mode; in response to determining the occurrence of the at least one event, control running of the at least one application to be blocked; generate information (1030a, 1030b) representing the occurrence of the at least one event, based on an image being displayed on the two screen images (1020a, 1020b) in the virtual reality mode; and control the display unit to display the generated information (1030a, 1030b) related to the at least one event on the two screen images (1020a, 1020b) in the virtual reality mode when the at least one event is an event to be displayed in the virtual reality mode. a display unit; and a controller configured to: detect whether the electronic device is connected with a head mounted wearable device; control the electronic device to operate in a virtual reality mode, when the electronic device is connected with the head mounted wearable device; control the display unit to display two screen images (1020a, 1020b) corresponding to a user's eyes on a screen in response to operating in the virtual reality mode; determine an occurrence of at least one event related to running at least one application in the electronic device while the two screen images (1020a, 1020b) are displayed in the virtual reality mode; in response to determining the occurrence of the at least one event, control running of the at least one application to be blocked; generate information (1030a, 1030b) representing the occurrence of the at least one event, based on an image being displayed on the two screen images (1020a, 1020b) in the virtual reality mode; and control the display unit to display the generated information (1030a, 1030b) related to the at least one event on the two screen images (1020a, 1020b) in the virtual reality mode when the at least one event is an event to be displayed in the virtual reality mode. detect whether the electronic device is connected with a head mounted wearable device; control the electronic device to operate in a virtual reality mode, when the electronic device is connected with the head mounted wearable device; control the display unit to display two screen images (1020a, 1020b) corresponding to a user's eyes on a screen in response to operating in the virtual reality mode; determine an occurrence of at least one event related to running at least one application in the electronic device while the two screen images (1020a, 1020b) are displayed in the virtual reality mode; in response to determining the occurrence of the at least one event, control running of the at least one application to be blocked; generate information (1030a, 1030b) representing the occurrence of the at least one event, based on an image being displayed on the two screen images (1020a, 1020b) in the virtual reality mode; and control the display unit to display the generated information (1030a, 1030b) related to the at least one event on the two screen images (1020a, 1020b) in the virtual reality mode when the at least one event is an event to be displayed in the virtual reality mode.