Abstract: China hopes to build an image of a responsible country in the field of climate change, but the reality is far from this. China suffers from many negative labels, which have formed an international image of China as a climate threat. From the perspective of international communication, the image of “China as a climate threat” results from several elements, including the cooperation of diversified international communication bodies, the common transmission of diversified channels, and the adopted transmission ways fit to international public emotions and ethics. That China pays attention to this fact, builds an appropriate model of foreign communication and fights for China’s discourse power in climate diplomacy is the key to eliminating the rumor that China is a climate threat and reshaping China’s moral image in the field of climate change.