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[Objective] To explore the attention evolution of China’s energy-saving policies since the reform and opening-up, reveal the internal laws and characteristics of energy-saving policies, provide policy suggestions for the formulation and optimization of energy-saving policies in the future, and then improve the overall level of the government’s energy-saving and emission reduction work. [Methods] Taking the energy-saving policy texts issued by the central government of China from 1978 to 2021 as the research object, this study constructed an analytical framework from the three dimensions of attention intensity, attention span, and cooperation degree of government departments to described the stage characteristics of China’s energy-saving policies attention evolution by the text measurement. Then conducted a policy modeling research consistency (PMC) index to evaluate the four sample policy texts and analyze the characteristics of attention evolution of those sample policies in detail. [Results] The attention intensity of China’s energy-saving policies presents an inverted U-shaped development trend, and the attention intensity in the later stage is not prominent enough. The attention span has changed from gradually expanding to falling,and the concerned content can not combine the current energy-saving goals enough. The cooperation degree of government departments has changed from a relatively scattered state of cooperation to a state of centralized cooperation. However, the cooperation subjects are only concentrated in a few departments.The PMC indexes of the four sample energy-saving policies are 6.21, 6.36, 7.52 and 7.83, of which the first two are within a acceptable level and the last two are within a good level. The attention intensity of the sample energy-saving policies is generally low, and the attention span is constantly improving. [Conclusion] It is suggested to further enhance the attention intensity of China’s energy-saving policies, emphasize the compatibility of policy measures with the objectives of China’s energy-saving policies, deepen the coordination between departments in issuing policies, and strengthen the strategic planning of China’s energy-saving policies.