Abstract: T213L31 is the new medium-range numerical weather forecast operational system in China. The operational suite of T213L31 was introduced. It elaborated the scheme that how to monitor the real time system. The operations analysis of T213L31 entire sequence and the introduction of functions, interruption events and related running information make readers have a more complete knowledge complete knowledge of T213L31 in operation in National Meteorological Center of China. The forecasting effect of T213L31 after comprehensive verifications during quasioperation and operation in NMC was evaluated. The result shows that forecasting effect of the T213L31 operational system has an obvious improvement that the original operational system T106L19 in NMC. The valid forecast day was prolonged about 1 day. But comparing with ECMWF forecast, there is still a certain gap, especially in the valid forecast day of medium-range weather forecast. It will be improved and developed further in the future.