For the disadvantages of a galvanometer control system in a scanning imaging system such as high power, large volume, low control precision and complex control, a high speed and precision galvanometer control system is designed. The operation principle of the system is analyzed. The design of hardware and software algorithm in the system is described. The design of numerical control and driving circuits of the system is introduced in detail. And a galvanometer control system is developed. The feasibility of the system is tested. Experimental results show that the system is in stable and reliable operation state to be applied in dynamic stable imaging system successfully and has widely application prospect.