1. An apparatus for generating a three-dimensional scene, comprising: a storage unit, being stored with an image and a plurality of depth data of the image; and a processing unit, being electrically connected to the storage unit and configured to generate a depth histogram according to the depth data, generate a region of interest of the image according to the depth histogram, decide a moving path of a virtual camera according to the region of interest, and generate the three-dimensional scene according to the image and the moving path.