Abstract: This paper discusses the impact of information asymmetry on green consumption and sustainable consumption. It emphasizes the importance of information in promoting green consumer behavior and highlights the role of media publicity and evaluation systems in shaping consumer perception and decision-making. The paper also explores the influence of government policies and subsidies on green consumption, noting that government intervention can benefit the entire green product industry chain. The authors suggest that in order to reduce the impact of information asymmetry, comprehensive and high-quality information should be provided to consumers, and consumers should be educated on information filtering and processing. The paper concludes by emphasizing the need for further research on the quantitative assessment of green information dissemination, the influence of green information on consumer psychology and behavior, and the role of government information in promoting green consumption. It calls for a multi-party linkage mechanism to drive the sustainable development of green consumption.