Based on the data of the ground temperature of meteorological station at 20:00 （Beijing time） November 5 and 6 1988 before the Lancang M7.6 earthquake at 21:00 November 6 the satellite thermal infrared digital image and satellite picture almost at the same time

this paper analyzed the relations between thermal infrared images and tectonics

lithology

landform as well as heat raliation characteristic of normal background of meteorological phenomena etc.; expounded the differences and relations of temperature-increased anomaly of seismic precursors with normal state; summed up the method and experience for seizing impending precursors using the time-space dynamic variation of thermal infrared images.