Abstract: According to the statistic analysis of geosynchronous space-craft abnormal events,the ESD(electricity static discharge)is one ofthe primary causes,It possessed about 30%,of the total abnormal events.This paper describes the method of quantity analysis of the ESD signaland reports the charging and discharging characteristics,of a numberof spacecraft exterior surface materials included Ag-SiO_2 micromeriticglass,S-853 white paint,SB-3 darken paint,anodizing aluminum and soon.