The new scatterometer Advanced SCATterometer (ASCAT) onboard MetOP A satellite provides surface wind speed and direction over global oceans with a spatial resolution of 25 km and 12.5 km square over two swaths. The accuracy of ASCAT retrieved wind is determined through various speed and direction comparisons with moored buoys laid by China Meteorological Administration (CMA). The wind speed bias between ASCAT and buoys is 0.9 m·s-1. The average absolute error and root mean squared difference are 1.2 m·s-1 and 1.4 m·s-1, respectively. The ASCAT wind over China offshore sea is credible with the correlation coefficient of wind speed between ASCAT and buoys is 0.94. And the primary operational application of ASCAT winds is on processing gradually in National Meteorological Centre (NMC), which can provide text data and PNG figures quasi real time.