
Two artificial methods, which affect the ionosphere, including physical and chemical, are studied in this paper. In this paper, we summarize the physical methods and the chemical methods of chemical ionization, such as the influence of different nuclear explosion types on the ionosphere, the ionospheric thermal effect of rocket launching, the influence of high-power radio heating on the ionosphere. World scholars’ researches on the human impact ionosphere research process and progress is systematically summarized too.