As an infrastructure in the field of green finance, green payment plays an important role in guiding the green-oriented allocation of social resources and the public's awareness of environmental protection, and promoting the greening, recycling and low-carbonization of the production methods of enterprises and the consumption patterns of individuals and households. This paper explores the basis of green payment development in China from five aspects: theory, market, policy, finance and digital ecology, and examines the positioning of green payment to help achieve the goal of "carbon neutrality" at three levels: macro, meso and micro. In the light of the lifestyles of Chinese residents, the specific application scenarios of green payment in China, such as transportation, low-carbon life and paperless payment, are compiled. We use electronic payment methods such as WeChat payment to explore the mode of green payment ecosystem to achieve low-carbon development, and explore the practical path of green payment to help "carbon neutrality" in both broad and narrow sense from the perspective of industrial chain. Finally, the above analysis is combined with the practical significance of green payment for carbon neutrality and the suggestions for the future development of green payment in different dimensions.