Based on the "h213 materials of National Meteorological Center and an actual need of the operation and scrv}cc operational system of Lanzhou limited area mesoscale numerical prediction model based on MM5 has   thebeen set up.  A lark    the number of forecasting products arc acquired from the system everyday, which have already become important benchmark for forecasting operation and service，and play more and more important role in elaborate prediction，extreme weather event predic t lon(for example, the torrential rain) and the meteorological geological calamity prediction，ctc.