Collecting energy conservation and emission reduction ( ECEＲ) policies in Beijing，Tianjin and Hebei province from 1981 to 2014，this paper establishes an econometric model to analyze the effectiveness of these ECEＲ policies，the evolution of the policies and measures of ECEＲ in Jing-Jin-Ji． In addition，the different effects of various measures of ECEＲ by Jing-Jin-Ji is also explored． The results suggest that the promulgation of ECEＲ policies in Jing-Jin-Ji has experienced a relatively fragmented and continuous process in the early years，a significant increase in the number，and then a gradual increase in the overall strength of policies since the beginning of the new century． However，the increase in the total effectiveness of the policies in Jing- Jin-Ji is mainly due to the increase in the number of ECEＲ policies． In the evolution process of ECEＲ policies， Jing-Jin-Ji tends to achieve short-term goals and the policy-making shows a certain lack of systematicness and authority． The effectiveness of financial，personnel，fiscal and tax，and other economic measures of Jing- Jin-Ji has a significant discrepancy． There are obvious differences among the three regions in the manner and degree of the usage of different policies and measures，which is a huge challenge for Jing-Jin-Ji to coordinate to promote energy conservation and emissions reduction． In the end，this paper puts forward some relevant suggestions on the improvement of the usage of a single ECEＲ policy，the application of market instruments and Jing-Jin-Ji’s regional collaborative governance．