1. A method for generating a three-dimensional (3D) mesh generating method based on unorganized sparse 3D points, comprising the steps of: a) receiving a plurality of unorganized sparse 3D points, a plurality of two-dimensional (2D) corresponding point information, and images; b) generating an initial mesh by using the received 2D corresponding information; c) removing an abnormal face from the initial mesh; d) determining if unused 2D corresponding point information exists among the received 2D corresponding point information; e) if unused 2D corresponding point information exists, reorganizing the initial mesh by performing a constrained Delaunay triangulation; and f) if unused 2D corresponding point information does not exist in the result of the confirmation, generating a final mesh.