The invention provides a massive log data intelligent operation and maintenance system. The system comprises a log collecting module, a log processing module, a log storage module and a business application module, wherein the log collecting module is used for collecting application logs, operation system logs and network equipment logs on a target machine, structuring log data and then outputtingthe log data to the log processing module; the log processing module is used for real-time processing and offline processing, real-time processing comprises real-time statistics, real-time alarming and real-time analysis, and offline processing comprises data batch storage, offline analysis and machine learning; then the processed information is sent to the log storage module; the log storage module is used for storing original log data, index data, statistical analysis data and resource configuration data, and comprises a MySQL relation database, a Redis memory database, an Elastic search engine and an HBase column storage database; the business application module is used for providing functions of inquiry statistics, monitoring and alarming, intelligent reports, instrument panels and knowledge bases through a web interface, and the data is read out from the log storage module.