The present invention relates to a system for calculating and managing the average weight of egg laying poultry, and a method for calculating and managing an average weight by using same. According to the present invention, provided is a system for calculating and managing an average weight, the system calculating the average weight of egg laying poultry and managing weights according to the average weight, and comprising: a weight measurement device, which is provided inside a cage-free poultry house or a cage poultry house and measures, in real time, a breeding environment and weights of the poultry by using a load cell and an environment sensor； a weight measurement/management server which receives weight data of the measured weights from the weight measurement device so as to derive the average weight of poultry and which generates weight management information by using the derived average weight； and a monitoring unit for receiving the derived average weight and the weight management information from the weight measurement/management server and providing same to a manager. In addition, provided is a method for calculating and managing an average weight, the method calculating the average weight of egg laying poultry and managing weights according to the average weight by using a system for calculating and managing an average weight, and comprising the steps of: (a) receiving, as weight data, measured weights of poultry by a weight measurement/management server from a weight measurement device provided inside a poultry house； (b) deriving, by the weight measurement/management server, the average weight of the poultry from the weight data； and (c) generating weight management information by using the derived average weight.La présente invention concerne un système de calcul et de gestion du poids moyen de volailles pondeuses, et un procédé de calcul et de gestion d'un poids moyen au moyen de ce système. Selon la présente invention, l'invention concerne un système
