China has proposed the ambitious 2060 carbon-neutral goal to alleviate environmental deterioration. The deep decarbonization in the power sector is always the focus of attention. However, there are scientific gaps on how this change can be realized, especially in the context of China. The main objective of this paper is to explore the carbon-neutral transition pathways in the Sichuan power sector and determine the capacity requirement of storage measures under different pathways. The EnergyPLAN tool simulates the current and future Sichuan power sector in 2060, including four renewable scenarios. It is found that, all the renewable scenarios can achieve the goal of carbon-neutral in 2060 and their system costs are similar to the reference scenario. Their performance in biomass consumption and electricity exportation differs by pathway. With the introduction of the pumped storage power station, the largest storage capacity of 1229 GWh appears in the high renewable penetration scenario, with a system cost growth of 9.3%. In brief, the methodological steps and results proposed in this paper can be helpful to realize the future decarbonization in the power sector in China.