The invention relates to a frequency adjustable microwave device with a nonvolatile property. The core units comprise a bottom end electrode, an anti-ferromagnetic metal mixed layer, first ferromagnetic metal, an oxide, second ferromagnetic metal, first metal, a resistance random material, second metal and a top end electrode from the bottom up in nine layers in total; the microwave device also comprises a series of electronic components: a T type bias device, a pulse generator, and a direct current voltage and low noise power amplifier; and a microwave oscillation device is used for switch output signals and adjusting the microwave output frequency through a series of voltage pulses, such as V and V<1>, V<2>, V<3> and the like. The microwave device can output microwave signals of different frequencies and can store frequency information, and has the nonvolatile property. Information stored in a resistance random memory unit can be transmitted in the microwave form through a STNO,and the microwave device can be used for data storage and transmission.