Agricultural social service is an important field in the development of modern agriculture. At present, agricultural social service should be based on the extension of the agricultural industrial chain and value chain. The supply and marketing system has important opportunity to participate in social services. It should be based on deep reform of supply and marketing system, rural industrial poverty alleviation, sustainable agricultural ecological development, development of farmers’ cooperative organizations, and increase of organization efficiency. It is recommended to undertake works in construction of platform of supply of agricultural products, commercialization of agricultural technology services, scale development of community-supported agriculture, and market based agricultural social capital. Through improving the team system of supply and marketing system, it is recommended to create platform-based flattening environment and create cooperative ecology in PPP mode to guarantee.