To provide basis for the typhoon resistant design of bridge structures in the coastal area in the southeast China, the whole-process data of the wind speeds and directions at the site of the Jiubao Bridge (the Eighth Qiantang River Bridge) under the climate condition of Typhoon Haikui in 2012 were acquired, using the wind speed and direction monitoring subsystem of the structural health monitoring system installed on the bridge. Based on the measured data, the fluctuation parameters (the mean wind speeds and directions, turbulence intensity, gust factors, turbulence integral scales and power spectra of the fluctuation wind speeds) in the process of the typhoon were statistically analyzed. The results of the analysis reveal that at the basic time interval of 10 min, the tendencies of the turbulence intensity of the longitudinal and transverse fluctuation wind speeds changing with the time are basically consistent and the tendencies decrease with the increase of the mean wind speeds. The gust factors of the different directions decrease with the increase of the mean wind speeds and the ratio of the means value of the longitudinal gust factor to that of the transverse gust factor is 0.30. At the time the wind speed is low, the decreasing rate of the gust factor is fast while at the time the wind speed is high, the decreasing tendency is not significant. The turbulence integral scales of the different directions all increase with the increase of the mean wind speeds and the measured fluctuation wind speed spectra are basically agreeable with the those of the Von Karman.