Using the UDP multicast communication, process monitoring, file monitoring, network monitoring and other technologies, the stationlevel monitoring and alarm system for CC weather radar data stream transmission service is developed. The realtime monitoring and short message alarm of radar scanning status, data stream upstream transmission, standard format base data local storage, base data replenishment, software operation and network operation status are implemented. Practice shows that the software runs stably, can effectively monitor the data flow transmission, and the short message alarm is accurate and timely. The alarm threshold is reduced from 6 minutes to 40 seconds, which improves the efficiency of fault detection and processing, the operational availability of weather radar, and the quality of data transmission, and reduced the duty pressure of radar station operators.