Abstract: On the eve of the COP15, the German Advisory Council on Global Change (WBGU) proposed a budget approach for solving the climate dilemma of existing international climate change regime, this proposal aimed to realize the long-term emission reduction target and build global low-carbon economy by managing the future greenhouse gases emission space. German carbon budget proposal is similar to China's carbon budget proposal published in the COP14, but the both still differ in some parameters, path of emission reduction, historical emission responsibility, etc. German proposal might try to meet the demand of both the north and south countries, but the unfair design makes it unfeasible.

Key words: carbon budget proposal, Germany, China, comparison