An electronic device comprising: a touch display that includes a main display area and a curved sub display area (1020, 1030) each corresponding to a front surface and a side surface of the electronic device, the curved sub display area being smaller than the main display area; the electronic device being configured to communicate with an external wearable device (3511; 3611; 3711; 3811; 3911; 4011; 4111; 4211; 4311, 4312, 4313, 4314; 4441, 4442, 4443); and a controller, the controller being configured to: when the electronic device is connected to the external wearable device so that they can communicate with each other, control the touch display to provide a user interface element associated with the external wearable device on the curved sub display area; based on receiving a touch input selecting the user interface element associated with the external wearable device, control the touch display to provide a plurality of user interface elements associated with the external wearable device on the curved sub display area; based on receiving a touch input selecting one user interface element of the plurality of user interface elements, control the touch display to provide an execution screen of an application corresponding to the selected one user interface element on the main display area, the execution screen of the application comprising a user interface for controlling the external wearable device; and based on receiving a user command through the execution screen of the application, transmit information corresponding to the user command to the external wearable device. a touch display that includes a main display area and a curved sub display area (1020, 1030) each corresponding to a front surface and a side surface of the electronic device, the curved sub display area being smaller than the main display area; the electronic device being configured to communicate with an external wearable device (3511; 3611; 3711; 3811; 3911; 4011; 4111; 4211; 4311, 4312, 4313, 4314; 4441, 4442, 4443); and a controller, the controller being configured to: when the electronic device is connected to the external wearable device so that they can communicate with each other, control the touch display to provide a user interface element associated with the external wearable device on the curved sub display area; based on receiving a touch input selecting the user interface element associated with the external wearable device, control the touch display to provide a plurality of user interface elements associated with the external wearable device on the curved sub display area; based on receiving a touch input selecting one user interface element of the plurality of user interface elements, control the touch display to provide an execution screen of an application corresponding to the selected one user interface element on the main display area, the execution screen of the application comprising a user interface for controlling the external wearable device; and based on receiving a user command through the execution screen of the application, transmit information corresponding to the user command to the external wearable device. when the electronic device is connected to the external wearable device so that they can communicate with each other, control the touch display to provide a user interface element associated with the external wearable device on the curved sub display area; based on receiving a touch input selecting the user interface element associated with the external wearable device, control the touch display to provide a plurality of user interface elements associated with the external wearable device on the curved sub display area; based on receiving a touch input selecting one user interface element of the plurality of user interface elements, control the touch display to provide an execution screen of an application corresponding to the selected one user interface element on the main display area, the execution screen of the application comprising a user interface for controlling the external wearable device; and based on receiving a user command through the execution screen of the application, transmit information corresponding to the user command to the external wearable device.