In order to solve many problems of the old version of GNSS/MET water-vapor report processing system, such as delayed report sending due to program crashes, this paper designs an automatic water vapor message processing system based on Zabbix-high availability cluster. The system includes a central station system and a message monitoring and alarm system, which effectively improves the timely rate of message transmission, saves computing resources, and realizes the whole process guarantee from data monitoring to automatic operation and maintenance.