Abstract: Electricity carbon emissions account for more than 40% of the total carbon emissions in China, and it is a pioneer in achieving the "3060 carbon target". In the existing research on carbon emission reduction methods, most studies have focused on the control of direct carbon emissions on the "source-side", and paid less attention to the carbon reduction effects from the demand side in the "carbon perspective". However, "electricity generation following power consumption" is an important feature of the power system. This feature makes the demand side mainly responsible for carbon emissions. The electricity consumption behavior of users will have a significant impact on the carbon emissions of the power system. To this end, this paper proposed a new power system carbon emission reduction mechanism that guided users to actively respond and reduced the power system carbon emissions, namely a low-carbon demand response mechanism. This mechanism uses dynamic carbon emission factors as guiding signals, and the willingness of carbon emission reduction or the price in the carbon market as incentive signals. Based on the power planning and operation simulation data of China, and the load data of a certain enterprise in Wuhan, the empirical analysis results have shown apparent carbon reduction potential for the low-carbon demand response technology from the system perspective and the user perspective. Finally, the critical problems affecting the implementation of the low-carbon demand response mechanism were studied and prospected from the three aspects of new standards, new technologies, and new mechanisms.