Abstract: The methods and technologies for positioning typhoon centers were studied and summarized systematically using the distribution of gray scale and the corresponding characteristics of brightness temperature on satellite infrared cloud imageries.Different positioning methods were designed for typhoon cloud systems with different structures and characteristics.The operational system,which includes seven methods,was established after optimizing and extending the arithmetic and realizing steps of all kinds of methods.Furthermore,the system played an efficient role in the actual operational application.On the whole,the alternation between the operator and computer was the main manipulation mode,and part functions were automatic.It was demonstrated that the system can locate the center of typhoon with any structural characteristics if a appropriated method was chosen.