A method for keeping and growing poultry and a unit for carrying out thereof are proposed. The method is carried out in a cage unit with tiers mounted vertically. The lower tier of said cage unit is arranged in the earth ground, in particular in a thermal premise which is arranged lower than the ground level. This allows the poultry moving into a ceiling opening of the grates of the thermal premise along an inclined ladder and a slat to the earthen floor of the thermal premise with the further transition around a circle in the cage unit, in which the boxes, where the poultry is allowed laying eggs, are arranged. Said boxes are arranged throughout the height of the cage unit in the openings of the grates of the walls. In doing so to allow moving the poultry along the slats, disposed throughout the height, they are fixed on supports with a rotary hinged unit. In doing so on an overhead ceiling cover of the cage unit an arrangement for delivery feed and drink with holding tanks is disposed, the feed and water are delivered by doses along piping from the central main. They come as a gravity flow into a spiral manger divided into sections by partitions with slats for sitting of poultry throughout the height of the cage unit. In doing so the poultry is additionally fed by the germinated grain, that grows on the earthen floor of the thermal premise, from excessive feed and water, which pour out while it is delivered into a spiral manger and food wastes are additionally delivered into windows of the grates for better germination of the grain. Also cleaning of a cage battery and poultry is carried out on the account of periodical delivery of water, which is heated up to 21-40 ºC, flowing down into settlers. The latter are arranged on the earthen floor of the thermal premise for collecting a biological fertilizer. A grain feed is additionally poured onto the earth floor of the thermal premise from a spiral chute of the manger from the sleeves of a tubular main piping of an ar
