1. An automatic photographing method, adapted to automatically photograph an image based on aesthetics, comprising: performing view finding on a pre-capture region so as to generate an image view; determining whether the image view satisfies an image composite template; calculating a moving distance between the pre-capture region and a focus region mapping to the image composite template and determining whether to set an image of the focus region as a pre-capture image according to the moving distance when the image view does not satisfy the image composite template; setting the image view as the pre-capture image when the image view satisfy the image composite template; and evaluating the pre-capture image according to personal information of a user so as to decide whether or not to photograph the pre-capture image.