1. An apparatus for creating a three-dimensional (3D) scene, comprising: a depth analyzer, comprising: a height map generator, being configured to generate a height map according to a plurality of depth data of a first image, wherein the height map and the first image have the same aspect ratio; and a detail finder, being configured to find a first region of the height map, wherein the depth data within the first region change more greatly than the depth data outside the first region; a mesh generator, being configured to create a plurality of grids on a plane according to the first region and generate a 3D mesh by morphing the height map with the grids of the plane, wherein a size of the plane is equivalent to a size of the height map, a second region within the plane corresponds to the first region of the height map, and the grids inside the second region has a finer resolution than the grids outside the second region; and a 3D space creator, being configured to generate the 3D scene by mapping the first image onto the 3D mesh.