NOVELTY - Method for transforming straw into methane, involves (a) obtaining tender rice straws, and pulverizing the rice straws into powder, (b) adding the rice powder to culture solution, inoculating hypha of Mucor to culture solution, and culturing the hypha to obtain glycerol fermentation liquid (GFL) in swing bed, and (c) adding the obtained GFL to medium containing activated sludge, culturing the medium by placing the glass bottle in the swing bed, detecting variation of liquid surface, and calculating the volume of the generated methane.    USE - The method is useful for transforming rice straw to methane.    ADVANTAGE - The method is simple, suitable for industrial production and environmentally-friendly as it utilizes straw, requires simple operational units, and enables continuous development of agricultural and ecological environment.    DETAILED DESCRIPTION - Method for transforming straw into methane, involves (a) obtaining tender rice straws and pulverizing the rice straws into powder, (b) (i) adding the rice powder to culture medium (M1) and mixing uniformly, (ii) adjusting the pH of the culture solution to 5, (iii) sterilizing the culture solution, (iv) inoculating hypha of Mucor to culture solution, and (v) culturing the hypha at 28 degrees C for 2-3 days to obtain glycerol fermentation liquid in swing bed, where the rotating speed of the swing bed is 120 revolutions per minute (rpm), and (c) (i) adding the obtained glycerol fermentation liquid to culture medium (M2) containing activated sludge, (ii) transferring the liquid added medium to glass bottle, (iii) culturing the medium at 35 degrees C by placing the glass bottle in the swing bed and connecting the other end of the glass bottle with a Shi fermentation tube through an infusion device, and sealing all the tube pipes by adhesive, where the rotating speed of the swing bed is 140 rpm, (iv) detecting variation of liquid surface after culturing for 2 hours in the tube, and (v) calculating the volume of the generated methane based on the detection.