A power grid enterprise low carbon benefit closed loop evaluation and management method is provided. The method employs the idea of full life cycle, considers electric power as a commodity, decomposes electric power low carbon benefits into all related links from production to consumption of a power grid enterprise, and unifies a carbon flow and a power grid enterprise service flow. The power grid enterprise service flow is divided into four links: scheduling, inspection, marketing and micro-networking. Low carbon benefit evaluation is conducted on the enterprise service flow chain, carbon discharge situation of planning and designing, scheduling and operation, maintenance, and marketing links of a power grid are analyzed, the analysis result then gives guidance to the links, so that a power grid enterprise low carbon benefit closed loop evaluation system is formed.