Basing on the atmospheric electric field data detected by the AMEO340 instrument over Yongzhuang ground-based observation station of Haikou province in 2011, combined with lightning location data and Doppler radar data, the atmospheric electric field characteristics of over-top thunderstorms in small area (2km around the center of the monitoring points) were analyzed. It indicates the warning threshold and the warning time of atmospheric electric field strength.

Taking the campus network system of Hannan Nongken Jialai Institute as an example, this paper analyzes the causes of lightning disaster and proposes the countermeasures against thunder struck events.