To address challenges such as insufficient guidance indicators for regulating massive flexible resources on the user side in power systems, which constrain the clean and low-carbon development of generation-side capacity, this paper proposes a whole-link collaborative mechanism based on the dynamic carbon emission responsibility factor for electricity, alongside involved stakeholders. The State Grid North China Branch calculates regional dynamic carbon emission responsibility factors, while the State Grid Beijing Electric Power Company transmits data to end-users via integrated platforms, achieving full-link connectivity in the “calculation-release-transmission-reception-response” workflow of the dynamic carbon emission responsibility factor. Pilot case studies demonstrate that after receiving carbon responsibility factors, optimized operational strategies enable flexible adjustment of power consumption for devices such as air conditioners, electric vehicle chargers, and industrial parks, allowing their participation in real-time power grid scheduling. This validates the technical feasibility of user-side resources contributing to power grid regulation. The findings provide theoretical support and practical pathways for the low-carbon transition of novel power systems. However, further R&D, application, and large-scale promotion require multi-dimensional coordination across departments and stakeholders. The promotion mechanisms and responsibilities of all stakeholders in the full-link process demand deeper investigation and policy refinement