By microwave discharge of the mixture of N2 and O2, water vapor and air, the NO+ and H3O+(H2O)n which originally exist in the earth's ionosphere were produced. The dynamics analysis indicates that these ions in the atmosphere are formed by the ion chemistry of the primary ions produced through the cosmic radiation of the air reacting with electrons, atoms and molecules surrounded them. This conclusion has also simulated the formation process of these ions. At the same time, the figures of the mass spectra of the microwave discharge of the mixture of N2, O2 the water vapor and air were also presented.