The invention discloses an IMS-based intelligent operation and maintenance fault diagnosis management method, which comprises the following steps: S1, collecting working environment data and network environment data for fault analysis; S2, displaying the collected environment data and network data to a client; S3, performing analysis through big data, and positioning a fault point accurately; S4, analyzing the cause of the fault, and judging whether an automatic solution mode or a manual solution mode is adopted or not; S5, fault solving: solving fault points solved by adopting automatic processing, automatically sending an order, and giving responsibilities to people; and S6, automatically counting a data report through IMS intelligent operation and maintenance faults for a manager to examine. By adopting the IMS intelligent operation and maintenance fault diagnosis management system, on one hand, the equipment state can be effectively monitored, the fault reason can be analyzed, the fault problem can be remotely solved, and one-key data statistics can be realized; and on the other hand, network access security and transmission security can be improved, the intelligent management level of security and protection equipment is improved, industrial upgrading is promoted, and smart city and smart traffic construction is improved.