An electronic device includes a camera, a light source unit, a display, and a processor, wherein the processor is configured to obtain a first image of a skin of a user by the camera while a first light is output through the light source unit, obtain a second image of the skin of the user by the camera while the first light is not output through the light source unit, obtain a third image representing a difference between the first image and the second image by converting, into a first difference pixel value, a difference between first brightness values of the first image and second brightness values of the second image, and display, on the display, information on an ultraviolet (UV) protection ingredient applied to the skin of the user, based on the third image.