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The meteorological data from five meteorological stations in Shenyang from 2005 to 2009 are used, and the spatial and temporal distribution regularities of fogs in Shenyang are summarized. The results show that there appears mist weather in nearly half a year in Shenyang, 164 heavy fog days per a year averagely.The frequency of mist and fog weather is relatively high in summer and autumn, and low in spring. Heavy fogs tend to appear in the morning. On the basis of the numerical forecasting, using the UPS forecasting method to make correction forecasting further for fog weather, the fog forecasting procedure for the Shenyang area is established.When the numerical forecast for fog weather shows 〖WTBX〗T-T〖WTBZ〗xover≤5 ℃,then there will appear fog weather; if -4 ℃＜〖WTBX〗T-T〖WTBZ〗xover≤5 ℃, there will be fog with visibility ≤500 m; and if 〖WTBX〗T-T〖WTBZ〗xover≤-4 ℃, there will be strong fog with visibility ≤200 m. When T-Txover＞5 ℃, if there is warm and moist advection, there will be fog weather, and if there is no warm and moist advection, there will no fog weather appear.