Ocean observing satellites have become an important part of the China’s three-dimensional marine observation system.They have played more and more important roles in marine pollution monitoring,marine environment and marine disaster monitor and forecasting,marine resource investigation and marine scientific research.In this paper,the author will give a brief review of China’s operational and scientific activities in satellites ocean observation during 2008 to 2010.These activities include the application of the HY-1B for red tide and green tide detecting and monitoring,sea ice monitoring,fishery resources assessment at coastal zone and ocean,marine water quality assessment,sea surface temperature monitoring and forecasting,ocean primary productivity and carbon cycle research,and the development in the ocean dynamic environment parameter application technology before launch of HY-2.The achievements we have made in the ocean observation and monitoring during the past 3 years indicate that,the development of the ocean satellite series and the application of the ocean satellite can greatly promote the development of China’s three-dimensional marine observation system and earth-observation system from space,accordingly we can improve the ability of acquiring the marine environmental parameter to sustain the marine economy development and the sea defense construction. Ocean observing satellites have become an important part of the China’s three-dimensional marine observation system. They have played more and more important roles in marine pollution monitoring, marine environment and marine disaster monitor and forecasting, marine resource investigation and marine scientific research. This paper, the author will give a brief review of China’s operational and scientific activities in satellites ocean observation during 2008 to 2010. These activities include the application of the HY-1B for red tide and green tide detection and monitoring, sea ice monitoring, fishery resources assessment at coastal zone and ocean, marine water quality assessment, sea surface temperature monitoring and forecasting, ocean primary productivity and carbon cycle research, and the development in the ocean dynamic environment parameter application technology before launch of HY-2.The achievements we have made in the ocean observation and monitoring during the past 3 years indicating tha t, the development of the ocean satellite series and the application of the ocean satellite can greatly promote the development of China’s three-dimensional marine observation system and earth-observation system from space, accordingly we can improve the ability of acquiring the marine environmental parameter to sustain the marine economy development and the sea defense construction.