The invention provides a fish, vegetable and edible fungus symbiotic system in a greenhouse. The fish, vegetable and edible fungus symbiotic system in the greenhouse is characterized in that the symbiotic system comprises fish culture ponds, edible fungus culture areas, vegetable culture areas, a water treatment unit, a water reservoir and a ventilation fan. The symbiotic system realizes symbiotic mixed culture of fish, vegetables and edible fungi, reduces environmental pollution caused by culture waste water discharge and CO2 discharge, realizes high-efficiency utilization of multiple energy resources and meets the demands for environmental protection, energy saving effect, low carbon and sustainable development.