In this research, the control characteristics of yarn tension and yarn speed in the knitting machine, and the interaction between them was ascertained. Based on this, and using such control methods as non-intervention, 2 freedom degree, and nonsensitive area, we were able to control tension and speed in the same time. If the technique proposed in this research is used, it is possible to set tension and speed, and operate the knitting machine automatically when the yarn kind changes, machine changes, and machine-or room-temperatures changes in during operation.