1. A photographing method comprising: photographing, by an electronic device, a plurality of images through a camera which is functionally connected to the electronic device; providing a photographing guide having a guide material associated with a validity of at least one photographed image during the photographing of the plurality of images; displaying, on a display which is functionally connected to the electronic device, a thumbnail window that displays a thumbnail image associated with the at least one photographed image based on a relative location of the at least one photographed image in an entire photographing scope; displaying the guide material that indicates a state of a currently input image, in association with the thumbnail window; and generating a single image using the at least one photographed image, wherein the guide material is provided in a box shape having a size corresponding to at least one distorted part associated with the currently input image.