In this paper, we propose control system which supports unicycle operation for human's skill up. Therefore, the unicycle operation analysis method is proposed first, and it is shown usefulness by experiment. The element used for analysis are rider's CP (Center of Pressure) and MBP (Moment Balancing Point) which negates a saddle rotation moment. Using those elements, we propose evaluation method of unicycle rider's operation. Dynamic unicycle simulator is used for supports unicycle operation for human's skill up.