An auto-feeding feeder of shrimp would be improved from fish auto-feeder or bedeveloped a new type that could scatter pellet feed evenly overall cage water body thatwould be fit to feeding behavior of white shrimp in net cage.The equipments forinstalling net cage grow-out system of white shrimp in hard clam pond would beestablished its construction mode that optimum efficiency could be achieved.The shrimpand hard clam production system would be developed and become a source inventorycontrol mode of hard clam grow-out in pond.The amount of feed and organic fertilizerthat put in hard clam pond would be reduced. The acidifying of pond sediment wouldbe slowed down.The clam would be have its brilliant outer shell and the soft inside itsshell be growing full.The growth and survival rate of shrimp in hard clam pond wouldbe arise and appendant income of clam farmer be increased.