NOVELTY - The method comprises collecting animal waste or poultry waste, anaerobically fermenting and depositing the waste for 1-3 days in a septic tank at normal temperature, eliminating the parasite, egg and harmful bacteria, leaching the solid deposition, reducing the odor to increase yield of the maggot breeding, leaching the yeast to obtain the waste liquid, which is used as a base material for culturing maggot, placing the waste liquid for culturing maggot in a maggot culturing tank, breeding maggot for 4-5 days under the controlled temperature condition, and collecting the maggot.    USE - The method is useful for processing harmless poultry waste.    ADVANTAGE - The method is capable of simply and conveniently processing the harmless poultry waste with reduced energy consumption and high efficiency in an environmentally friendly manner.    DETAILED DESCRIPTION - The method comprises collecting animal waste or poultry waste, anaerobically fermenting and depositing the waste for 1-3 days in a septic tank at normal temperature, eliminating the parasite, egg and harmful bacteria, leaching the solid deposition, reducing the odor to increase yield of the maggot breeding, leaching the yeast to obtain the waste liquid, which is used as a base material for culturing maggot, placing the waste liquid for culturing maggot in a maggot culturing tank, breeding maggot for 4-5 days under the controlled temperature condition, collecting the maggot by common sieving method and using the crawl-up habit of the maggot to prepare the maggot product comprising albumen powder, chitosan polysaccharide, chitosan oligosaccharide, compound amino acid and antimicrobial peptide, placing the waste liquid in a biogas tank, controlling the temperature and pressure while preparing the biogas, collecting the prepared biogas as the boiler fuel, boiling the boiler to produce steam and then supplying heat to the maggot breeding system, adjusting and controlling the temperature of the biogas tank, providing the bacterial fermenting heat source and steam for disinfecting and sterilizing, collecting the rest biogas liquid and the biogas mud in the biogas tank as culturing agent of photosynthetic bacteria and Bacillus thuringiensis, and culturing microorganism for 5-20 days by photosynthetic bacteria natural-ecological technology for obtaining the photosynthetic bacteria and Bacillus thuringiensis to reach 1.6x 108 CFU/ml of photosynthetic bacteria concentration in the culturing agent and 3-17 billion/g of total number of Bacillus thuringiensis spore.