The present invention belongs to the field of information technologies, and discloses a big data based power grid information operation and maintenance active early-warning method. A system comprises state early-warning, threshold early-warning, fast change early-warning, trend early-warning, evaluation early-warning and association early-warning, so that effective combination of the information operation and maintenance active early-warning method and the information operation and maintenance system is implemented, promotion and application of a bid data technology in a power grid information operation and maintenance field are implemented, and efficient statistical analysis, mining analysis and real-time stream processing of information operation and maintenance data are implemented based on the big data technology, data value is effectively mined, active early-warning is implemented, and efficiency of information operation and maintenance is improved.