City is a highly concentrated area of population and in-dustry,as well as an imbalanced region with the highest concentration of carbon emissions and weaker carbon se-questration capacity.As the main ecological environment and carbon sequestration carrier of city,blue-green spa-ces reflect the quality of urban life and ecology.From the perspective of carbon sequestration capacity building in blue-green space systems,the measurement method of carbon emission and carbon sequestration based on vari-ous land use properties is proposed,through the coupled analysis of net carbon emissions and ecological carrying capacity coefficient,identifying and evaluating urban blue-green spaces,in order to provide necessary support for optimizing urban blue-green space systems and promo-ting high-quality and low-carbon urban development.