The invention discloses a lifting type permanent magnet stirring device and a method. The device comprises a sleeve, a permanent magnet, a permanent magnet driving mechanism, a tray, a telescopic rod and a telescopic rod driving mechanism, the sleeve and the permanent magnet are assembled in a nested mode, the permanent magnet is driven by the permanent magnet driving mechanism to rotate, and the tray is arranged in the sleeve in a supported mode through the telescopic rod; the telescopic rod is driven by the telescopic rod driving mechanism to ascend and descend. The permanent magnet stirring device has the advantages of being simple in structure, easy and convenient to maintain, low in cost, convenient to operate and diversified in magnetic field mode, the controllability of the casting blank quality is improved, and the casting blank quality is improved. The device can be widely applied to the field of metallurgical melt permanent magnet stirring and the field of experimental research, meets the requirement for diversified research on the influence of permanent magnet stirring on melt solidification, tissue, performance and the like in a laboratory, and lays a foundation for subsequent industrial application.