In order to determine a reasonable value of basic wind speed at both sides of Taiwan Strait，comparative study of extreme and basic wind speed under different climate conditions are carried out in this paper. The measured wind speed data are obtained from a meteorological station in Taipei from 1961 to 2015. The extreme and basic wind speed are estimated through Gumbel distribution adopted by building wind resistant design standards at both sides of the Taiwan Strait. The annual maximum wind speed sampling method and typhoon wind speed sampling method correspond to the mixed and typhoon climate conditions，respectively. The results show that，for the identical wind speed observation data，the extreme wind speed obtained by building wind resistant design standard in Taiwan TB2015 is slightly less than that obtained by current national building wind resistant design standard（GB50009） in Fujian，and the basic wind speed is just opposite，but the estimated wind speed difference between the two standards is very small. The extreme/basic wind speed under typhoon climate is larger than the corresponding value under mixed climate，and is closest to the measured extreme/basic wind speed within an error less than 0.5%. For both sides of the Taiwan Strait severely affected by typhoons，the estimated wind speed under typhoon climate condition is suggested to adopt as the basic wind speed.