The approach to synthesis and implementation of the controller of ITER plasma stabilization system is considered. The advantage of the presented approach is that the controllers of various dimensions are optimized. Software computes the controllers whose dimension and integral quality criterion are Pareto-optimal. It is described the algorithm to choose the proper controller to final implementation when equations of the plasma stabilization system have a high dimension. The presented integral quality criterion evaluates the upper bound of the ensemble of transient processes for some arbitrary plasma disturbances.