3 during the comfortable climate period. In summer, it has cool climate resources with an area proportion of up to 90%, and 88% of the region achieves excellent vegetation ecological quality, with forest coverage (77.5%) and vegetation coverage (75.8%) ranking first among 16 districts in Beijing. The net primary productivity (490.2 g/(m2·a)) is 14% higher than the average in Beijing. The established ecological service value evaluation index system can effectively evaluate the ecological service value of natural oxygen bars. The ecological product service value of Huairou’s “China Natural Oxygen Bar” is 14.3987 billion yuan, accounting for 32% of the region’s GDP that year. Among them, the value of forest climate regulation and air purification accounts for 87.2% of all ecological service values. Compared to the average of Beijing, it has significant regional advantages in ecological service value. These results indicate that the newly established climate ecological assessment system can better reflect the value of “China Natural Oxygen Bar” climate ecological products."/>