【目的/意义】全球变暖不断加剧，使得人们对降温需求和持续性能源消耗之间的矛盾逐渐突出。在不消耗外部能源的情况下，达到有效的降温，是改善生活环境及缓解能源压力的有效手段。【分析/评论/进展】被动辐射制冷材料可以在不额外耗费能量的前提下自行降温，被认为是一种较为理想的应对全球变暖、降低降温能耗的办法。经过对相关文献调研发现，醋酸纤维素呈现出良好的辐射制冷性能及环境友好性，在绿色辐射制冷涂层领域展现出巨大潜力。【结论/展望】未来，随着针对材料结构及光谱调控机制的研究不断深入，以醋酸纤维素为基础的辐射制冷涂层材料有望为节能降温领域提供可靠的解决方案。

［Objective/Significance］ As global warming continues to intensify，the conflict between people’s need for cooling and the consumption of sustainable energy is becoming increasinglyapparent. Achieving effective cooling without consuming external energy is of great significance inimproving the living environment and alleviating the energy crisis.［Analysis/Discussion/Progress］ Passive radiative cooling materials can cool themselves without consuming additional energy and areconsidered a relatively ideal method to address the issue of global warming and reduce cooling energyconsumption. According to relevant literature，cellulose acetate exhibits excellent radiative coolingperformance and is environmentally friendly，demonstrating tremendous potential in the field of green radiative cooling coatings.［Conclusion/Prospect］In the future，with in-depth research on the material structures and spectral regulation mechanisms，cellulose acetate-based radiative cooling coating materials are expected to provide more reliable solutions for the field of energy conservation and cooling.