Radiative sky cooling (RSC) technology dissipates the terrestrial heat to the extremely cold outer space, without any energy input and any pollutant produced. It has the potential to simultaneously alleviate the two challenges of energy crisis and global warming. In this review, we look for the inspirations from the relatively mature solar thermal harvesting (STH) technology to solve the challenges in the RSC field. We firstly summarize the comparability and similarity of the two technologies from five levels: principles, materials and structures, devices, systems, and applications. Subsequently, the valuable inspirations or strategies from the STH technology are proposed to advance the development and application of the RSC technology. Finally, we discuss the application of the RSC technology to solve the challenges of water shortage and night lighting in remote areas, aim to broaden the application scope of this technology.

辐射天空冷却（RSC）技术将地面热量散发到极冷的外部空间，而没有任何能量输入和任何污染物的产生。它有可能同时缓解能源危机和全球变暖的两个挑战。在这篇综述中，我们从相对成熟的太阳能集热（STH）技术中寻找灵感，以解决RSC领域中的挑战。我们首先从五个层次上总结两种技术的可比性和相似性：原理，材料和结构，设备，系统和应用。随后，提出了STH技术的宝贵启示或策略，以促进RSC技术的开发和应用。最后，