Abstract:Ice core is an important carrier of the past climatic and environmental change information. In this paper, we firstly introduced how ice cores record past climatic and environmental changes. Then, we elaborated the achievements of ice core research in the past climate change, levels of atmospheric greenhouse gases, solar activity, volcanic eruptions, and human activities. Thirdly, the role of ice core research in promoting relevant environmental policy making was stated, such as the ban on Pb additives in gasoline and greenhouse gas emission reduction policies. And finally, it was suggested that the state should establish a National Ice Core Facility to drill and store the ice cores from the Three Poles (Antarctic, Arctic, and the Third Pole) to serve the future scientific research and national development.