Abstract: An average weight calculation and shipment management system of edible poultry includes: a weight measurement device that is installed in a poultry house and measures in real time a weight of edible poultry by using a load cell; a weight and shipment prediction server that receives weight data measured in real time from the weight measurement device, derives an average weight of the edible poultry, and predicts a shipping date by using the derived average weight; and a monitoring unit that is provided with the average weight and the predicted shipping date derived from the weight and shipment prediction server. The weight and shipment prediction server collects a large number of the weight data and densifies the large number of collected weight data to derive an average weight of the edible poultry, and predicts the shipping date by using the derived average weight.