Harmonic radar is becoming a useful technology for tracking the movements of insects. This paper introduces the application of harmonic radar technology, including assessing the feasibility of attaching electronic tags to insects, the fabrication of electronic tags, estimating rates of detecting and finding adult insects, and estimating the movement trajectory of adult insects in the field. The purpose of this paper is to encourage more entomologists to use this technology in integrated pest management research in agriculture and forestry in China.