On August 10, 2006, the super typhoon Saomai landed in Wenzhou, Zhejiang Province. It is the strongest typhoon landed in Chinese inland since 1949. Saomai seriously affected the coastal areas of eastern China, and caused 25 billion US dollars in losses. Saomai caused serious damages to the Zhejiang, Fujiang, Jiangxi, Hunan Province, respectively. Saomai characters in term of the path and the strength are analyzed in order to give a reference to the analysis and prediction of the typhoon in the future. The results show that there is a quite close relationship between the moving path of the typhoon and the environmental wind field around the typhoon. Therefore, environmental wind field around typhoon must be considered while predicting the path of typhoon. The Saomai is reinforced by small vertical wind shear and strong upper divergence. The strong upper divergence is in favor of production of surface convergence, and then enhances the strength of the typhoon. Among the factors for enhancing the typhoon, the change in its scale also needs to be considered. The typhoon horizontal scale shrinking makes the typhoon energy concentrate, and then enhance the intensity of the typhoon. The emergence of negative divergence field at upper air, the vertical wind shear, landfall, and other factors are the main reasons for its slowing down.