On the basis of the concept used in the high-electric-field method reported by Yokoyama, we have developed a new measurement method of the polar anchoring energy of nematic liquid crystals. This method can derive the polar anchoring energy only by measuring the capacitance change against the applied voltage of a LC sample, and thus me method can be easily applied to measuring the polar anchoring energy of homeotropically-aligned samples. This paper presents the results of the computer simulation for verifying the developed method and also some experimental results of the polar anchoring energy for homeotropically-aligned samples.