The modern climate change science has made important contribution to the development outlook progress of mankind. The combination of China's new thinking about the development pattern with the international development outlook has promoted the success of COP21 in Paris. The paper summarized the four highlights of the Paris Agreement and the five problems to be solved after Paris conference. China's low-carbon development goals are of significant meanings for its sustainable development. The paper has analyzed the scientific essence of the goals. The 13th-Five-Year-Plan is the key period of China's low-carbon transition. For this end the five important works have been suggested. The paper has emphasized the strong correlation between addressing climate change and improving air quality. The domestic and international aspects of addressing climate change are supported each other. The domestic low-carbon transition is the key and basis.