The current wind design specifications of Taiwan are based on the gradient height up to 500 meters, above the gradient height, assuming the gradient wind speed to maintain a uniform velocity, however, the wind speed of real natural wind field is not maintained constant after reaching the gradient height, and it may occurs shrink phenomenon or external expansion phenomenon. It is different from design specifications. This study is about using the wind speed higher than 10(m/s) of typhoons periods. Using the wind speed data of the Central Weather Bureau cast by radiosonde, this research includes the data of Banciao station and Hualien station for eight typhoons from 2015 to 2017. The research results will be helpful for structure design and to provide more references for revising the wind design specifications of Taiwan in the future.