NdFeB magnetic material on the external magnetic field, the external magnetic field on the work done by permanent magnet, into the function for the magnetization. For the closed-circuit magnet, the magnetic power to magnetic energy (BH) in the form of storage in NdFeB internal. The open magnet, the magnetic power stored in the permanent magnetic material part of the internal, the other in the form of magnetic storage space near the two poles. Permanent magnet in the magnetic field stored in the air gap and permanent magnet is proportional to energy product. Magnet is an energy storage device. Use of permanent magnet pole gap of the magnetic field interaction and can achieve mechanical energy or sound energy or electromagnetic energy of one another, can be made into a wide variety of functional devices. To change the internal structure of magnetic materials or their nature and status of key force, manufacturing magnetic water devices, magnetic devices. NdFeB permanent magnet devices with energy-saving, high efficiency, the system is compatible. Easy operation and high reliability.