Based on 57 years(1948—2004) reanalyzed daily wind data of NCEP,the stability and interdecadal variability of global monsoon system is studied.

It can also be used to delimit the geographical distribution of the global monsoon systems.

Because the behaviour of mankind has been increasingly becoming the main geological strength which causes the changes of global system, the contemporary global changes evidently indicate the catastrophic characteristics and are paid more and more attention to by the international sciences and different countries.

The overall aim of the studies on the global system is to resolve the problems occurringon a global scale and to realize a coordinated and sustainable development between resources,environment and economy.

The studies of the dynamic processes and mechanism of East Asian monsoon system(EAMS) variability and anomaly,especially on the relation of the interannual and interdecadal variabilities and anomalies of EAMS to quasi-stationary planetary wave activities,are systematically reviewed.

Africa and Indian subcontinent) with 90° E as the divide, as well as the subplanetary land-sea distribution over southern Asia on the formation of the Indian monsoon system (IMS) and east Asian monsoon system (EAMS), the major conclusions being summarized as follow.