The general ecological restaurants produced by Qingzhou Changrong Greenhouse Engineering Co., Ltd. have a relatively large space, located away from bustling urban areas. Inside the restaurant, the space is divided and decorated with green plants or fresh flowers, creating a quiet environment that gives diners a sense of being in a paradise away from the world. Some ecological restaurants are built within agricultural parks or farms that are self-sufficient in vegetables, fish, and meat. They can achieve a circular ecological model through planting (providing fresh fruits and vegetables for the restaurant, vegetable scraps for breeding, and organic waste for biogas fermentation), breeding (providing fish and meat for the restaurant and manure for biogas fermentation), the restaurant (providing leftover food for breeding and organic waste and wastewater for biogas fermentation), and biogas (providing fertilizer for planting and new energy in the form of biogas for the restaurant). Such parks help promote social harmony and sustainable development and should be a type of catering enterprise that is given priority for support and development.