A method of controlling a display of an electronic device connectable to a wearable device comprising a display, comprising: determining a current situation of the electronic device using at least one piece of information of the electronic device, the at least one piece of information including at least one of state information of the electronic device and surrounding information of the electronic device by the electronic device; and turning on or off at least some areas of the display of the electronic device according to the determined current situation by the electronic device, wherein the step of determining a current situation of the electronic device comprises determining whether the electronic device is connected to a wearable device when an event is generated in the electronic device, the method further comprising receiving, from the wearable device, information indicating whether the wearable device is being worn by the user or not; the method characterized by: when it is determined that the electronic device is connected to the wearable device, and the electronic device receives information from the wearable device indicating that the wearable device is being worn by the user, turning off an entire area of the display of the electronic device and transmitting information on the event to the wearable device for the information corresponding to the generated event to be displayed on the wearable device, and turning on only a predetermined area of the display of the electronic device corresponding to the event and displaying information corresponding to the event in the turned on area when the information from the wearable device indicates that the wearable device is not worn by the user. determining a current situation of the electronic device using at least one piece of information of the electronic device, the at least one piece of information including at least one of state information of the electronic device and surrounding information of the electronic device by the electronic device; and turning on or off at least some areas of the display of the electronic device according to the determined current situation by the electronic device, wherein the step of determining a current situation of the electronic device comprises determining whether the electronic device is connected to a wearable device when an event is generated in the electronic device, the method further comprising receiving, from the wearable device, information indicating whether the wearable device is being worn by the user or not; the method characterized by: when it is determined that the electronic device is connected to the wearable device, and the electronic device receives information from the wearable device indicating that the wearable device is being worn by the user, turning off an entire area of the display of the electronic device and transmitting information on the event to the wearable device for the information corresponding to the generated event to be displayed on the wearable device, and turning on only a predetermined area of the display of the electronic device corresponding to the event and displaying information corresponding to the event in the turned on area when the information from the wearable device indicates that the wearable device is not worn by the user. when it is determined that the electronic device is connected to the wearable device, and the electronic device receives information from the wearable device indicating that the wearable device is being worn by the user, turning off an entire area of the display of the electronic device and transmitting information on the event to the wearable device for the information corresponding to the generated event to be displayed on the wearable device, and turning on only a predetermined area of the display of the electronic device corresponding to the event and displaying information corresponding to the event in the turned on area when the information from the wearable device indicates that the wearable device is not worn by the user.