Abstract: Geoengineering means human activities that change the earth's environments in plans and large scale to response to climate change and its infuence. This article reviews the background and the main research areas of geoengineering, involve scientific theories, plans of projects, risk assessment and the mechanism of ethical and international governance, and so on. Then we analyze the possibilities of geoengineering in the future based on the international actions, and fnally propose some suggestions about China's roles in the feld of geoengineering research.