Abstract: From the 1.0 and 2.0 Era to the 3.0 Era of global climate governance, city has gradually realized the role transformation from "Participant behind the Scene" to "Co-leader". This change is driven not only by the extension of global governance theory in the field of climate change, but also by the promotion of urban diplomacy theory and the "dilemma of collective action" in global climate governance. For now, however, China's city couldn't give full play to the function of "co-leader"-it is not only facing the dilemma of foreign development with the implicit power structure of "South-North" and divergence in climate governance among developing countries, but also facing the bottleneck of internal optimization with the "unidirectional" type structure of climate governance between central government and local government, and coordination between city's "economic development" and "governance responsibility". To solve those problems, China can adopt the mode of "parallel tracks" formed by "two trunk roads plus six branch roads" to seek reasonable countermeasures. In other words, the country of China can seek its identity of developing country in the global society, further improve domestic policies and legislation on greenhouse gas emission reduction, and give city a certain degree of autonomy; while the city can deepen urban climate diplomacy, strengthen the "bidirectional" type of climate governance interaction with the country of China, and promote the long-term development of "resilient city".