NOVELTY - A fungi and plant and animal agricultural production system comprises marsh gas pool used for obtaining methane, biogas residue and biogas slurry by processing cow dung and urine. The methane is used as clean energy source. The biogas residue and biogas slurry are applied to cultivated land or grassland for planting sweet elephant grass. The sweet elephant grass for cultivating cows is chopped and crushed, and the rest of the sweet elephant grass used for planting fungi is crushed. The co-produced bacteria package medium is produced after the fermentation process of cow dung.    USE - Fungi, plant and animal agricultural production system (claimed).    ADVANTAGE - The agricultural production system facilities biological improvement by symbiosis of the fungi and the grass, directly returns waste fungi residues so as to fertilize soil, enhances water, gas and light permeability of the soil, improves granular structure of the soil, and increases yield of sweet elephant grass.    DETAILED DESCRIPTION - A fungi and plant and animal agricultural production system comprises marsh gas pool used for obtaining methane, biogas residue and biogas slurry by processing cow dung and urine. The methane is used as clean energy source. The biogas residue and biogas slurry are applied to cultivated land or grassland for planting sweet elephant grass. The sweet elephant grass for cultivating cows is chopped and crushed, and the rest of sweet elephant grass used for planting fungi is crushed. The fungus finished products are marketed as goods, and the waste medium is made into bad fungi and bacteria feed for cattle. The co-produced bacteria package medium is produced after the fermentation process of cow dung. The sweet grassy field is used for mushroom cultivation. The sweet elephant grass is planted by using sweet stems mature seedlings for elephant grass, carrying out vegetative planting process, carrying out rapid propagation using a stem cutting or plugging, planting directly in the field, selecting healthy, pest-free stem, tearing leaf wrapped axillary buds, cutting into small elements with a knife, beveling the blade segment surface, shortening upper left buds and lengthening lower left buds to improve the survival rate and anti-water loss, selecting water and fertilizer for growing seedlings under lighting conditions or loose sandy loam nursery, applying 3000 kg/acre farm manure, transferring manure which is biogas and waste slag bacteria directly to field fertilizer, ploughing land, making thin surface, forming soil, providing drainage ditch between furrows, seeding the prepared section axillary bud, covering axillary buds if planting directly in the field, pouring water, daily watering to keep the soil moist, seeding emergence for 7-10 days, relaxing section of surrounding soil, weeding and fertilizing, and transplanting when the growth of the seedlings is 20-25 cm. The breeding time is April to October month in north, and annual breeding in south. The slant angle between the ground and soil is 45 degrees C.