Magnetic Bearing has the advantages of no friction, high-speed, high precision, withoutlubrication, it becomes one of the bearing directions of the development of high-speed or ultra-high-speed rotary mechanism.According to the electromagnetic induction theory and automatic controltheory, this paper designed and developed a five-dimensional control of magnetic bearing device andits control system, and successfully conducted in the laboratory many times as a long time suspendedrotating.And on the basis of the static magnetic characteristics and dynamic magnetic performancetest, the magnetic bearings suspended and closed-loop control system were analyzed, the resultsshow that the magnetic bearings and its closed-loop control system can successfully 9kg weight shaftsuspended in the air as high-speed rotation, the results provide theoretical and practical basis for itspractical application.