Most developed countries have reached their carbon emissions peak and entered a period of rapid decline in emissions. These countries have introduced active measures in efforts to achieve carbon neutrality while occupying a dominant position in emerging industries. This article aims to sort out the policies and mechanisms in the process of achieving carbon peaks, promoting carbon neutrality, and promoting social consensus in developed countries, so as to provide reference for China’s carbon peaks and carbon neutrality. By reviewing the experiences of different developed countries, this study compares and analyzes their lessons, summarizes the inspirations that developed countries have brought to us in terms of carbon neutral policy mechanisms, and provides suggestions for China’s path to carbon neutrality. International experience shows that carbon neutrality is a systematic project that requires multiple measures and orderly progress. While reducing transformation costs, it is necessary to accelerate the cultivation of emerging industries; the realization of the carbon neutrality vision requires a sound market mechanism to accelerate the energy market reform; carbon neutrality is not only a transformation of energy and economy, it will also bring changes to individuals' lifestyles. Therefore, the general social consensus is an important guarantee for the successful realization of carbon neutrality. The research suggests that in order to achieve China’s carbon neutrality goals, we must do a good job of top-level design and a step-by-step action plan of carbon emission reducetion; accelerate and deepen energy market reforms; raise social awareness and promote people’s overall consensus on carbon neutrality; and continue to deepen international cooperation.