Provided is a method of performing three-dimensional (3D) graphics geometric transformation using a parallel processor having a plurality of Processing Elements (PEs). The method includes performing model/view transformation and projection transformation on a first group of vertex vectors using the parallel processor; calculating a value used for quaternion correction of the first group of vertex vectors using a general-use processor, and simultaneously performing model/view transformation and projection transformation on a second group of vertex vectors; performing quaternion correction and screen mapping on the first group of vertex vectors, and simultaneously calculating a value used for quaternion correction of the second group of vertex vectors using the general-use processor; and performing quaternion correction and screen mapping on the second group of vertex vectors.