Currently the function of operational locust monitoring system mainly focus on after hazards monitoring and assessment

and to find the way effectively to perform early warning and prediction has more practical meaning. Based on two years of 2001 and 2002 continuous field sampling and statistics for 7 phases observation of locusts eggs hatching

nymph growth

adults sample statistics and calculation

spectral measurements as well as synchronously remote sensing data processing

we raise the view point of three stage monitor the locust hazards with Remote Sensing. They are:（1） during the egg hitching phase remote sensing can retrieve parameters of land surface temperature （ LST ） and soil moisture;（2） during nymph growth phase locust increases appetite greatly and remote sensing can calculate vegetation index

leaf area index

vegetation cover and analysis changes; （3） during adult phase the locust move and assembly towards ponds and water ditches as well as less than 75% vegetation cover areas and remote sensing combination with field data can monitor and predict potential areas for adult locusts to assembly. In this way the priority of remote sensing technology is elaborated effectively and to provide technique support for the locust monitor system. The idea and techniques employed in the study can also be used as a reference for other plant diseases and insect pests.