The Working Group II (WGII) contribution to the IPCC AR5, Climate Change 2014: Impact, Adaptation, and Vulnerability, comprehensively assessed the needs, options, opportunities, constraints, and limits of adaptation with a new focus on the climate-related risks in a systematic manner. As a main information source for the negotiations on the 2015 Agreement under the UNFCCC, the key findings of the WGII reports will have significant influences on many important issues including global long term goal, adaptation, loss and damage, etc. The reports contain the most up-to-date and comprehensive scientific knowledge on climate change, thus to achieve a better understanding of the conclusions, which could further facilitate the domestic work and international negotiation.