By illustrating the relationship between the climate system and the scientific data,a requirement of scientific data for the earth system research has been proposed to be paid more attention to climate change studies. The research progresses of global climate change in China for the recent 10 years have been reviewed and the important role of observation datasets and assimilated production in the global climate change has been pointed out. Furthermore, the meteorological data sharing situation in the world is also concluded. Finally,we put forward some suggestions on the future development of Data Sharing Centre of Earth System Science in China.