Reducing the concentration of carbon dioxide (CO2) in the air can effectively alleviate climate change. Air capture, which captures CO2.directly from the air in an industrial process, is an alternative option to address climate change. The results of recent studies on the energy demand in CO2.capture process and the costs of CO2 transport and CO2.storage in air capture are analyzed in this paper. Considering renewable energy will not produce additional CO2.in the process of utilization, the electric energy in CO2.capture process of air capture driven by wind energy is different from that of carbon capture and storage. Taking externalities of renewable energy into account, the trading price of CO2.emission is taken to assess the cost of electric energy in CO2.capture of air capture driven by wind energy. Finally, the total cost and the total cost savings of air capture driven by wind energy under different scenarios are analyzed.