1. An input/output apparatus based on voice recognition, comprising: a voice recognizing means for recognizing a voice command inputted from outside; a pointing control means for calculating a pointing location on a screen which corresponds to a voice recognition result transmitted from the voice recognizing means; a displaying means for displaying a screen; and a command control means for processing diverse commands related to a current pointing location; wherein the voice recognizing means performs analog-to-digital (A/D) transformation on a user voice corresponding to the voice command, extracts a feature vector based on the A/D transformation user voice, and performs a pattern matching for the feature vector by using a recognition model parameter; wherein the pointing control means performs mapping on a voice recognition command corresponds to the voice recognition result to a voice recognition candidate command; wherein the displaying means displays the screen by duplicating a region corresponding to the calculated pointing location on a prior screen; wherein the screen is divided into blocks, and the blocks are divided into sub-blocks; wherein neighbor blocks in the blocks identically include parts of the sub-blocks, and the neighbor blocks are duplicated by the parts of the sub-blocks.