NOVELTY - Converting industrial waste into sucrose using housefly, comprises (i) cultivating larva by adding into clean wheat bran, and naturally sub-culturing the larvae; (ii) mechanically grinding bagasse, and culturing into 5-10 generations; (iii) inoculating larvae of converted bagasse fly strains into culture medium containing bagasse powder and wheat bran, and genetically screening the high expression fly strains secreting cellulose; (iv) placing stable high expression fly strains with cellulose in e.g. bagasse, and propagating; (v) fermenting; (vi) breeding; and (vii) drying.    USE - The method is useful for converting industrial waste into sucrose using housefly (claimed).    ADVANTAGE - The method is environmental friendly (claimed); produces product having high bioavailability, high quality, and high fertilizer effect based on scientific proportion; shortens the composting period; and utilizes high value-added resources.    DETAILED DESCRIPTION - Converting industrial waste into sucrose using housefly, comprises (i) collecting sucrose feed domesticating housefly by placing wild housefly in milk powder, feeding sugar, cultivating larva by adding into clean wheat bran, and naturally sub-culturing the larvae into 5 generations or more having stable propagation characteristics; (ii) mechanically grinding the bagasse into 200-800 meshes, destructing the lignin structure, adding wheat bran and water having into bagasse culture medium having water content of 50-90%, under ambient temperature of 20-30 degrees C, culturing under relative humidity of 50-80% after domestication of housefly larvae, inducing bagasse into the culture medium, where the mass ratio bagasse powder and wheat bran added into culture material, is 1:9, and slowly increasing the addition amount of bagasse powder and wheat bran in a mass ratio of 5:5, and culturing into 5-10 generations, and increasing the addition amount of bagasse powder and wheat bran in a mass ratio of 5:5, and culturing into 10-15 generations, where the mass ratio of bagasse powder and wheat bran, is 6:4, and the biological characteristics of housefly life according to each calendar achieves a natural or wheat bran feeding growth standards, and obtaining converted bagasse fly strains; (iii) inoculating larvae of converted bagasse fly strains into culture medium containing bagasse powder and wheat bran in the mass ratio of 6:4 to carry out the breeding process, and then randomly forming groups, where each generation contains crude fiber content in the culture material as determined by lowest group of pupation into flies, genetically screening the high expression fly strains secreting cellulase, where the crude fiber content in the culture material is less than 15%, and feeding for 3-5 generations, and then obtaining of stable high expression fly strains with cellulose; (iv) placing stable high expression fly strains with cellulose in 60% bagasse, 20% wheat bran, 5% pig oil, 5% sucrose and 10% protein auxiliary materials, and propagating under high fiber, high sugar and high fat environment, and obtaining cellulose after circulation for 10-15 generations, and finally obtaining high expression fly strain with dual lipase; (v) mechanically grinding bagasse into 200-800 mesh, and adding white rot fungus in concentration of 106-108/ml of culture liquid, water and bagasse powder in mass ratio of 1:1:20, and mixing for 8 hours, and activating bagasse powder and un-fermented bagasse powder in a mass ratio of 1:500 by mixing, and starting the fermentation process for 1-3 days, to obtain modified bagasse powder, and adding a pH adjusting agent into molasses in a mass ratio of 1:0.8-1.2, and adjusting the pH to 6.5-7.5, heating the filter mud at 70-80 degrees C, washing with an equal volume of water, removing cane wax, and adding 40-60 wt.% modified bagasse powder, 10-15 wt.% honey, 10-20 wt.% filter mud, 10-15 wt.% wheat bran or bran and 8-10 wt.% protein, and regulating until the water content is 65-75%, and obtaining industrially produced fly maggot as base material, which meets the industrial standards of maggots feed; (vi) adding cellulose and lipase into maggots feed, and allowing the breeding process, and then circulating 10-15 generation stable industrially transformed bagasse fly strains, to obtain transformed strains maggot flies industrial products; and (vii) drying the fly maggot industrial product residual material to obtain functional organic fertilizer, and preparing animal health feed by using housefly larvae and adult flies or biomedical materials or products by carrying out biotechnology processing.