easily and fully automatically because the rotation speed of the spiked roller and yarn roller are automatically controlled and corrected if the measured value departs from the standard value 2 because control and correction of a tufting machine is performed automatically the tufting machine is not required to be watched as in the case of conventional machine and there is no fear of personnel inattention or fault which results in a great saving of man power 3 because the only required operation is to preset the standard stitch number and the standard yarn feed length for a unit ground fabric feed length operation is quite simple requiring no skill can be handled by unskilled personnel easily and a uniform finish of products can be expected 4 because the rotation speeds of the spiked roller and yarn roller are controlled and corrected independently or parallelly good response of correction control is obtained and the correction control is finished in a short time 5 because control and correction can be performed without stopping the tufting machine long hours of continuous operation can be performed which leads to a great increase of production capacity 6 because the accuracy of correction can be set freely by changing the range of allowable limit fine controls in accordance with color design is possible the method of this invention is far more functional compared with the conventional method and provides a quite practical and convenient control method.