In this paper, based on the 20 year's data, we analysed the monthly mean stratospheric circulations of northern hemisphere over 30, 50, and 100 hPa. Their spatial distribution as well as annual and interannual variation were obtained. It points out that the general circulation change of stratosphere over northern hemisphere from winter to summer appears to be the revolution from the vortex to anticyclone over polar region. The change in the higher layer about 30 hPa is in April which is about more than one month earlier than in the lower layer about 100 hPa. On the contrary, from summer to winter the anticyclone over polar region is changed into vortex. It is ended in August in higher layer near 50 hPa which is more than one month earier than in the lower layer near 100 hPa. All these results are useful for the seasonal prediction.