Abstract: In this paper, the two months' integration about a global atmospheric circulation model including many physical climatic processes has been made by the global climatic mean data sets in January. The results show that the seasonal circulation systems and the steady active centres are fairly simulated by this model. And the variation of kinetic and internal energy with time show that the computation tends to be stable, consequently, it is expected that this model can be used to simulate, and be capable of simulating the climate changes on time scale of months to years.