The treatment comprises (a) installing intermittently operating stirring claws and ventilating devices operating from the lower surfaces in generally the entire area in a container; (b) previously mixing a highly decomposing material having a rich fibrous property, and a seed fungus consisting mainly of a cellulose decomposing fungus, and forming an accumulated layer having required height with a predetermined moisture content in the container; (c) retaining the accumulated layer in active fermenting state; (d) carrying a raw material from a loading box into the container and uniformly loading the raw material a little at a time in one end of the accumulated layer having sufficient capacity; (e) thinly, uniformly mixing the raw material within a predetermined amt. to form a main fermenting chamber assuring the continuous active fermenting state in the container; (f) using the raw material-free remained capacity of the main fermenting chamber is an ageing chamber; (g) successively moving the fermented accumulated layer to the ageing chamber from the main fermenting chamber owing to the action afforded by the stirring claws to form the accumulated layer having predetermined height adjusted by means of an discharging opening provided at the other end at the upper portion in the container; retaining the resulting accumulated layer; (h) moving the residual deposit exceeding the predetermined height to a storing chamber from the discharging opening. Also claimed is that the equipment is formed by (a) installing the intermittently operating stirring claws and the ventilating devices operating from the lower surfaces in generally the entire area in the container; (b) connecting the container to the storing chamber by means of the discharging opening; (c) providing a carrying device connected to the loading box in the upper portion space facing the discharging opening; (d) forming the tip portions with predetermined length of the carrying device to thinly, uniformly spraying the raw material; forming the sufficient wide region in the container to the major fermenting chamber; (e) using the remained portion in the container as the ageing chamber.    ADVANTAGE -   The method and equipment provide stable and effective fermentation of the organic waste. This enhances energy efficiency for treatment and uses the treated matter as organic fertiliser. The equipment partitions the main fermenting chamber, the ageing chamber, and the storing chamber and successively moves the treated matter. Salinity, excess germs are purged with the treated matter to stabilise the fermentation treatment and depress odour. The sufficiently aged uniform treated matter is constantly available for use as fertiliser.