The present invention relates to a fish cage culture system, and is characterized by comprising a main body part, a fixing part, a moving part, and an air inlet part. As for the main body part, multiple floats are formed at an outside of a trunk which has an inner space therein and an opened upper portion, to allow the trunk to have buoyancy. An inclined plane is formed on an inside of a lower portion of the trunk. An outlet passing through the trunk is formed in a lower portion of the inclined plane to communicate with the inner space. As for the fixing part, movement holes with fixing bolts are formed in the outside of the trunk of the main body part. Fixing poles for being fixed on the seabed are inserted into the movement holes to fix the trunk by the fixing bolts. The top ends of the fixing poles form a towing loop by connecting the fixing poles respectively. As for the moving part, a body is formed to correspond to the inner space of the trunk so that the body is movable inside the trunk fixed by the fixing part. A buoyancy groove is formed in the edge of the body, and has a discharge pipe having an opened bottom surface and a valve formed at the upper side thereof. A net is formed in the center of the buoyancy groove. As the air inlet, an inlet pipe through which air flows into by a motor is formed to pass through the bottom of the trunk such that the end of the inlet pipe is positioned on the bottom surface of the buoyancy groove, so that the air flows into the buoyancy groove of the moving part and thus the body of the moving part has buoyancy.본 발명은 가두리 양식 장치에 관한 것으로, 본 발명은 내부에 내부공간을 형성하고 상측을 개방한 몸통의 외측으로는 상기 몸통이 부력을 가지도록 다수의 부구를 형성하며 상기 몸통 하부 내측에는 경사면을 형성하고 경사면의 아래 부분에 몸통을 관통하는 배출구를 형성하여 내부공간과 연통되도록 형성한 본체부와, 상기 본체부의 몸통 외측에는 고정볼트를 형성한 이동홀을 형성하고 상기 이동홀에는 해저면에 고정되는 고정기둥을 삽입하여 고정볼트에 의해 몸통을 고정하며 상기 고정기둥의 상단은 고정기둥을 각각 연결하여 견인고리를 형성한 고정부와, 상기 고정부에 의해 고정되는 몸통의 내부에서 이동하도록 몸통 내부공간과 대응되게 형성한 몸체의 테두리에는 저면이 개방되고 상측에는 밸브가 형성된 배기파이프를 형성한 부력홈을 형성하고 상기 부력홈의 중앙에는 망을 형성한 이동
