The GIS-based Climate Monitoring and Disaster Warning System for Fujian Province was developed by the Fujian Meteorological Office by means of 3S(RS,GIS,GPS) technology,software programming and system integrating technology.The operational platform of the system was established on the Microsoft Windows XP operating system.The functions developed include: base map making,data processing,icon labeling,real-time monitoring and historical contrasting, diagnosis analyzing and disaster warning,data querying and region searching,map reviewing and graphics analyzing,database storing and web transmitting,and bulletin and disaster report making.With various climatic monitoring and meteorological disaster warning reports,the system helped local authorities foresee floods,droughts and water supply fluctuations from 2002,which can also be applied to the related scientific research fields.