Abstract: The CSM-320E network information management and control device used by Hohhot Power Supply Bureau has no perfect data maintenance software, and data maintenance can only be done manually.Aiming at this problem, Hohhot Power Supply Bureau developed the CSM-320EA remote data analysis system to improve reliable data analysis.The system can analyze the data of remote measurement, remote signaling and remote control, so as to facilitate the data maintenance.After the use of the system in 15 substations in Hohhot Power Supply Bureau, the sensitivity of the defect detection and the reliability of the data are greatly improved.