Abstract: Carbon Capture, Utilization, and Storage （CCUS） technologies are crucial for the decarbonization of the power sector, yet the comprehensive benefits of CCUS under varying rates of coal power decommissioning remain unclear. This study employed the Global Change Assessment Model （GCAM） to integrate coal retirement rates within three Shared Socioeconomic Pathways - Representative Concentration Pathways （SSPs-RCPs） scenarios: SSP1-2.6 （accelerated coal phase-out）, SSP2-4.5 （gradual coal phase-out）, and SSP5-6.0 （slow coal phase-out）. It dynamically quantified the varying impacts of CCUS technology on the power sector's transition to low carbon using a technology learning curve model. The results indicated that by 2060, all three scenarios would still emit （500-650）million tonnes of carbon, necessitating the early deployment of Direct Air Capture （DAC） carbon-negative technologies. Economically, SSP1-2.6 proved to be the most costly, being 13.54% and 6.31% higher than SSP2-4.5 and SSP5-6.0, respectively. Overall, by 2060, CCUS under these scenarios was projected to alleviate water resource pressures by （2.179-3.824）billion tonnes, reduce CO₂ emissions by （685-925）million tonnes, bridge employment gaps caused by coal retirement ranging from 43.74 thousand to 191.33 thousand jobs, but it also increased energy consumption by 6.39% to 11.75%.