Abstract: Direct air capture （DAC） technology is a crucial pathway to achieve carbon neutrality. Coupling with renewable energy is a necessary requirement for the deployment of DAC technology. With the rise of global commercial demonstration projects for adsorption-based DAC, the coupling technology of adsorption-based DAC and renewable energy has become a research hotspot. In terms of coupling system design, renewable energy powers the DAC system through methods such as electricity-driven and electricity-thermal combined energy supply. It also ensures stable operation by integrating electrical energy storage and thermal energy storage and can optimize the energy supply mix through multi-energy complementarity. The system operation modes include continuous operation and intermittent operation. The key equipment involves renewable energy power generation devices, adsorption reactors, energy storage equipment, etc. Additionally, their integration technology ensures the matching of energy transmission and conversion. The adaptability of different renewable energy sources （wind energy, solar energy, etc.） coupled with DAC needs to consider energy stability, accessibility and cost. In the evaluation and optimization of the coupling system, key indicators include CO₂ capture efficiency, energy utilization efficiency and system stability. Modeling methods such as linear programming, mixed-logic dynamic, and Markov decision process are used to analyze system performance and explore the impact of factors such as the volatility of renewable energy as well as the performance degradation of adsorbents on the system. Moreover, the volatility of the atmospheric environment significantly affects the efficiency of adsorption-based DAC, and optimizing process parameters to adapt to changes in atmospheric conditions can improve its performance. The bottleneck in the current development of adsorption-based DAC technology is the high cost caused by high energy consumption and low net capture rate. The solution paths focus on optimizing the performance of adsorption materials and coupling with renewable energy. In the future, it is necessary to further optimize the coupling method to improve energy utilization efficiency. Carrying out technical-economic analysis studies and policy analyses on the coupled system technology is conducive to promoting the large-scale commercial deployment of adsorption-based DAC.