This section focuses on the core theme of “Adaption to Climate Change in Marine Systems” and elaborates the role of the oceans in adaption to climate change，the results show that the world’s oceans in 2019 were the warmest in recorded ocean observation，in the future，the regional temperature，annual precipitation and offshore sea level of China will continue to rise，the intensity and frequency of extreme weather events are more likely to increase. It also introduces the process of the international community’s attention to the marine response to climate change，in the international climate governance the ocean issues have gradually become the focus of attention. The scientific issues，other relevant policy issues，international cooperation mechanisms and the strategic game among all parties related to Marine response to climate change were reviewed，with a focus on the capacity of coastal areas adapt to climate change. In the future，we still need to do a good top-level design of marine development and ocean climate change，strengthen macro-control over the exploitation and utilization of marine resources，enhance our marine disaster management ability and level under the influence of climate change，and actively promote marine ecological civilization construction and sustainable development.