In view of the abnormal situation in the running process of the ADTD Lightning Location Monitoring System, an analysis is made of the causes of system failures caused by the abnormalities in the lightning location equipment, network communication module, central station receivers, and central station software. The relevant methods and measures used by the maintenance staff in troubleshooting are summarized. The abnormality analysis of the system is mainly based on the dataprocessing procedures and basic operating principles.