A control method includes sending a switching signal to a camera to control the camera to switch between a landscape shot-mode and a portrait shot-mode, receiving an image from the camera, determining whether a display screen is in a landscape orientation or in a portrait orientation, and controlling the display screen to display the image upright. The image includes a landscape image captured by the camera in the landscape shot-mode or a portrait image captured by the camera in the portrait shot-mode. Controlling the display screen to display the image upright includes controlling the display screen to display the portrait image upright when the display screen is in the landscape orientation or controlling the display screen to display the landscape image upright when the display screen is in the portrait orientation.