As the policy working environment becomes increasingly complex, uncertain and random, it is urgent to research into the synergy problems of energy conservation and emission reduction policies in China. This paper sorts out the major aspects of the current researches on energy conservation and emission reduction policies and policy synergy based on the overview of the existing policies of energy conservation and emission reduction. In view of the analysis, it can be found that as to the researches on energy conservation and emission reduction policy, at present researches mainly concentrate on the aspects of analyzing the deficiencies and working difficulties, evaluating the result, analyzing the potential and cost in different policy circumstances, looking for the optimal way, analyzing the policy welfare, discussing the international comparison and using for reference, and so on, but pay less attention to the synergy problems of energy conservation and emission reduction policies; the researches of policy synergy mostly focus on the aspects of discussing the synergetic situation, necessity, performance and implementation mechanism, etc. By drawing on existing research results, this paper further discusses the follow-up research directions of policy synergy on energy conservation and emission reduction polices from the perspectives of assessing the current synergetic situation and performance, discussing the enlightenment and reference from the foreign countries synergy mode, exploring the optimal synergy way, analyzing the international synergy models and best degree of synergy, exploring the approaches to avoid the failure and negative effects of the synergy, analyzing the synergy of energy conservation and emission reduction polices with other polices, building the synergetic mechanism, etc. [ABSTRACT FROM AUTHOR]