Rapid urbanization has brought a huge impact on the agricultural areas around city. Urban agriculture can provide twenty percent of the world's food, making an important contribution to food security. Under the background of global environmental crisis, people have begun to pay close attention to ecological protection of agriculture. Organic agriculture follows the natural rules and does not use any chemical synthetic pesticides, fertilizers and growth regulators, so it is one of the effective models to achieve ecological agriculture. Peri-urban organic farms benefit from their proximity to cities, they also can offer some cultural services such as picking, education and so on, which deepen visitors' understanding of agriculture and connection with nature. Based on the conceptual framework of the relationship between ecosystem services and human well-being, this study took Beijing as an example to comprehensively evaluate the ecosystem services of peri-urban organic farms from three aspects, including provision, regulation and culture. The results showed that there were 271 organic farms in the suburbs of Beijing as of 2019, with a planting area of 10,900 hectares, accounting for 5.1 percent of the arable land area in Beijing. The valuation of provision services were 1.612 billion Yuan. In terms of regulating services, organic farms provided 21.4 million Yuan in soil carbon sequestration value, and reduced energy use by 164,000 GJ, 2,639 tons of CO₂, 202 tons of SO₂ and 29 tons of PO₄^3- emissions compared to the conventional farms in the same area. In terms of cultural services, organic farms provided 118.9 million Yuan of picking services, facilitating more than 120 farmers' markets, 50 lectures, salons and other education activities, which accumulated social capital. Urbanization has proceeded rapidly in China, land resources in the suburbs were not only competing with other land uses, but also were subject to various restrictions of ecological management. This study attempts to visualize the number, scale, and spatial pattern of peri-urban organic farms, and assesses the variety of ecosystem services. In particular, we highlight the contribution of peri-urban organic farms to cultural services such as leisure, recreation, education and publicity, in addition to limited provisioning services. The results will provide a basis for deeper understanding of peri-urban organic farms ecosystem services, which can further improve the level of agricultural management sophistication and urban sustainability.