To achieve the goal of “carbon peak and carbon neutrality”，energy system is the main battlefield and power system is the main force. The green and low-carbon transition path of the power industry has a profound impact on the process of carbon peak and carbon neutrality of the whole society. Firstly，this paper analyzes the challenges and opportunities faced by the power industry to achieve the double-carbon goal；Secondly，on the basis of constructing three scenarios of deep low-carbon，zero carbon and negative carbon in power system，relying on the self-developed “double carbon” electric power planning software package GESP-V，the consumption structure of primary energy and terminal energy，the future development orientation and trend of various types of energy are quantitatively studied，and the low-carbon transition path of power system including three stages of carbon peak，deep low-carbon and carbon neutral is proposed，the change trend of power supply cost under different scenarios is analyzed. On this basis，from the aspects of coal power development positioning，new energy development and utilization，diversified development of supply and demand，new energy industry chain，and power supply cost dredging，the implementation points and relevant suggestions to adapt to the green and low-carbon transition of power system are proposed.