Radiative cooling technology has made significant strides in recent years, especially in the areas of daytime radiative cooling and its applications in photovoltaic systems. Radiative cooling is a passive cooling technique that dissipates heat by radiating it towards outer space. Recent research has focused on enhancing its cooling efficiency under sunlight conditions. The development of daytime radiative cooling relies on the design of novel nanomaterials and multilayer structures. These materials and structures are engineered to reflect most of the sunlight while strongly radiating heat in the mid-infrared spectrum, achieving effective cooling during the day. Researchers have developed various high-performance materials, such as multilayer photonic crystals, metal-dielectric composites, and ultra-thin metallic films, to optimize radiative cooling effects. Beyond environmental cooling, radiative cooling technology has shown great potential in photovoltaic systems. By applying radiative cooling techniques to the surface of photovoltaic cells, the operating temperature of the cells can be effectively reduced, thereby improving their conversion efficiency and lifespan. This has significant implications for enhancing the overall performance and economic viability of photovoltaic systems. However, challenges remain in this field. These include optimizing the performance of radiative cooling materials under diverse climatic conditions, scaling up production for commercial applications, and integrating these technologies seamlessly into existing infrastructure. Future research directions may focus on developing more efficient and cost-effective materials, exploring hybrid cooling systems, and investigating the long-term durability of radiative cooling solutions in real-world applications. In this paper, Recent research progress in daytime radiative cooling technology and its applications in photovoltaics is summarized with current challenges and future directions.