1. A 3D object generation apparatus, comprising: a 3D object generation unit for generating a 3D object by latticizing and dividing a structural element of a 2D web page into a plurality of polygons; and a 3D object manipulation processing unit for, when an object manipulation signal is inputted in the generated 3D object, generating 3D transform matrices by changing vertex coordinate values of respective lattice elements in response to the object manipulation signal and generating a transformed 3D object by applying the generated 3D transform matrices to predefined Cascading Style Sheet (CSS) transform.