In the perspective to meet CBAM，this article analyzes how Shanghai can promote international ecological discourse power with the rule making power as the core and how Shanghai can support the nation to enhance ecological discourse power. In essence，CBAM is the developed countries’ unilateral action to modify international climate and trade rules to protect their own industries or interests，reflecting the struggle for power in international environmental rules making. In order to promote international ecological discourse power with the rule making power as the core，we need to occupy the moral highland and to attain the leading status in technology and institution development，based on knowledge production，so that we can conduct dialogue with developed countries backed by the strength. Based on the analysis on Shanghai’s shortcomings in terms of green production technologies，carbon pricing policies，carbon emission MRV，the related knowledge production and etc.，this article suggests that，based on knowledge production，Shanghai should occupy the moral highland with “just transition” topic，build up the nexus of assimilating and transferring advanced foreign green technologies，accelerate adaptation to and mutual recognition with the developed countries concerning non-explicit carbon prices and carbon emission MRV，as well as nurture the third-party services industries to support the enterprises to meet CBAM challenges.