TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Method: The method comprises:(A) preparation of the mixed culture fluid by sampling soil supernatant fluid, adding 0.5-1.5 g/L sodium acetate at volume ratio of 10-50%, and putting in an anaerobic glove box for preservation and preparation;(B) inoculation of mixed culture fluid by adding 50-150 ml of sodium acetate in the anode chamber, inoculating the mixed culture fluid, adding 5-20 ml microorganism nutrient fluid, and adding sodium nitrate in the cathode;(C) leaving it in room temperature, till it steadily outputs stable voltage; and when voltage starts to drop, replacing 30-100% of anode fluid with microorganism nutrient fluid to enable the voltage to be steadily and continuously output, and when voltage starts to drop again, replacing again 30-100% of anode fluid with microorganism nutrient fluid to raise the voltage and force it to be steadily and continuously output, and when the peak value of output voltage in each cycle output is the same, the enrichment of the electricity generation is accomplished;(D) domestication of electricity generation: when the voltage starts to drop again, replacing the anode fluid with microorganism nutrient fluid and organic wastewater to be processed, where during the first replacement, the organic wastewater to be processed occupies 5-10% of the volume of the anode chamber, thus the voltage is stable and is steadily output, upon the voltage starts to drop later, always replacing the anode fluid with microorganism nutrient fluid and organic wastewater to be processed with increasing ratio of organic wastewater to be processed by 5-15%, until all the organic wastewater to be processed replaces the anode fluid; and(E) accomplishing the launch: when the anode fluid is fully switched to organic wastewater to be processed and the output voltage is stable, the inoculation and domestication launching of microorganism fuel cell is accomplished and entering stable operational state.The mixed culture fluid is prepared by using domestic sewage at the entrance of the sewage plant, second sedimentation tank activated sludge in the activated sludge sewage plant, and soil supernatant fluid or fluid in the wastewater process bioreactor. Preferred Components: The nutrition ingredient of the microorganism nutrient fluid is (mg/l) sodium acetate (500-1200), nitrogen (50-120), phosphor (3000-7000) and potassium (30-150).