The Central Weather Bureau (CWB) of the Republic of China officially began its NWP operation on July 1, 1988. The global forecast model at CWB is a multi-level grid point model with fourth order potential enstrophy conservation scheme in the horizontal differencing. Based on the forecast data, January and July model climatology from the day-1, day-2, and day-3 forecasts are constructed. Also the simulated mean meridional circulation are investigated. The systematic errors can be identified by comparing the model climatology with the observed analyses.