In order to overcome the shortcoming of complex and traditional methods in measuring standard resistor, and to calibrate the standard resistor fast and accurately, this article has proposed a new method of measuring the standard resistor based on the digital multimeter—8508A’s function of true Ohm ratio method. In this article, both the direct fourwire ratio measuring method and true ohm ratio measuring method were adopted to calibrate the standard resistor, and we find that true Ohm ratio method can eliminate the influence of thermoelectric power and circuit disorders better. Compared with the traditional and complex measuring method, this method is more convenient and efficient. Finally, the measuring uncertainty of calibration values has been also analyzed and assessed in order to verify the accuracy and reliability of this calibration method.