NOVELTY - Processing organic substance, such as organic refuse, involves (a) mixing the organic refuse and soil containing earthworm droppings, and fermenting mixture, or (b) adding organic refuse and soil containing earthworm droppings to a bag-like container, closing the bag-like container, mixing organic refuse and soil containing earthworm droppings in the bag-like container, replenishing moisture content of material in the bag-like container, and fermenting the material within the bag-like container.    USE - The method is useful for processing organic substance, such as organic refuse, organic waste material and animal excretion, and producing fermented product using bag-like container (all claimed). The fermented product is used as fertilizer.    ADVANTAGE - The method performs fermentation process using bacteria, and produces fermentation product which is easy to handle and does not cause offensive odor.    DETAILED DESCRIPTION - Method (M1) for processing organic substance, such as organic refuse, involves (a) mixing the organic refuse and soil containing earthworm droppings, and fermenting obtained mixture, or (b) adding organic refuse and soil containing earthworm droppings to a bag-like container, closing the bag-like container, mixing the organic refuse and soil containing earthworm droppings in the bag-like container using an external force regularly or irregularly, replenishing moisture content of material in the bag-like container, regularly or irregularly, and fermenting the material within the bag-like container. INDEPENDENT CLAIMS are included for the following:    (1) method (M2) for processing animal excretion other than organic refuse, involves replacing organic refuse and using human feces, poultry feces, livestock waste and pet including dog and cat waste;    (2) method (M3) for processing organic waste material, involves replacing organic refuse and using organic waste material other than organic refuse;    (3) method (M4) for producing fermented product, involves performing the above-mentioned method (M1); and    (4) bag-like container for processing the organic substance.