Abstract: In recent years, the ecological environment monitoring work of marine protected areas in China had been strengthened year by year, the monitoring technical standards had developed steadily, and the monitoring capacity building had been gradually advanced, which had played an important role in the supervision of marine protected areas. At present, the main developed countries in the world paid more attention to the system construction of marine ecological environment monitoring, which had entered the era of "sky-air-sea, the surface of the water- water body-submarine " stereoscopic monitoring. China should learn from the advanced experience of foreign countries, make great efforts to construct and perfect the "sky-land integration" ecological environment monitoring system of marine protected areas, accelerate the process of standardization of ecological environment monitoring of marine protected areas, and strengthen the construction of information sharing mechanism system of marine protected areas, which provided strong support for the development of ecological environment monitoring and supervision of marine protected areas in China.