A superconducting magnet system for high power microwave source focusing and cyclotron electronic apparatus is provided, wherein, the superconducting magnet comprises an inner superconducting main coil, an outer superconducting main coil, two end compensation coils, a regulating coil and a central regulating coil. These coils are formed by coiling Nb3Sn/Cu superconducting wire. The superconducting magnet can operate off-line through solid nitrogen formed by a cryocooler and high-pressure nitrogen. The superconducting magnet and the superconducting switch constitute a closed loop, thereby achieving magnetic field stability, without outside electromagnetic interference. The superconducting magnet system can provide a magnetic field having special spatial distribution and high stability.