A lightning monitoring system based on WebGIS is designed to satisfy the realtime and accurate requirements of monitoring lightning data in this paper. The aim of easy expansion is achieved in the system which utilizes the Spring MVC and Hibernate opensource web framework technology. Arcgis 10.0 for Server is selected as the GIS server, which provides the perfect functions of spatial analysis and data processing. To ensure the safety and stability of the data, Oracle database is used for storing the detailed lightning data. The results of query and statistics are displayed by the table, column chart and spatial map, which satisfy meteorological researchers’ visualization requirement of statistics and analysis of lightning data. Experimental results indicate that the designed system has the advantages of better realtime performance, stronger commonality and higher efficiency.