Abstract: The fall armyworm (FAW) (Spodoptera frugiperda) is an invasive pest that poses a serious threat in China to corn production. Yunnan Province is not only the first station of FAW's invasion into China from abroad, but also an important source of the pest spreading from the southwestern border to inland areas of the country. Monitoring of FAW is a key prerequisite condition for implementing regional ecological control of the pest in Yunnan Province. This research system expounded the basic idea and construction strategy of the monitoring system for FAW in Yunnan from five aspects: guiding ideology, main information to be monitored, monitoring area planning, key monitoring areas and types, and monitoring system organization and management. A three-in-one, three-level linkage monitoring organizational model of provincial, prefectural (city) plant protection departments and corn growers was proposed. The monitoring system proposed a new approach to monitoring and controlling FAW in Yunnan Province.