Hog waste is a very serious problem and causes pollution in Taiwan now, hence, it must be controlled before it is too late. This Institute had studied the mushroom compost turners during recent years. A compost turner had been designed and successfully manufactured for mushroom growers in Taiwan. However, the production cost of mushrooms in this country is too high compared with those mushroom growers in those under developed countries all over the world especially in Asia. Therefore. the techniques learned from the mushroom turner are used to solve the hog waste problem which has had already existed for so long a time in this country. Three sets of automatic hog manure turners have already been designed and manufactured, two sets of the turner were delivered and experimented in a hog farm in Hsinchu prefecture. the third one was delivered and experimented in a pig farm in Ilan prefecture. The performances of those turners are very satisfactory in those places. special features of those turners are: (1)The use of turners is safe. (2)The mixing of upper and lower part of wastes are very good. (3)The manure can be taken away from the system automatically at any place. (4)The manure can be cut to small pieces or even powder so that famers can put them in the field without any difficulty. However, there is also a minimum defect by using the turner, that is this turner can be operated just only in one direction. It must be improved immediately for better performances and thus easier to extend the turners to famers.