A production line for rearing and/or breeding insects and/or larval forms of insects, comprising: a) at least one breeding line for breeding insects for laying the feed thereon, wherein the breeding line comprises at least one storey, which constitutes an autonomous conveyor belt, preferably with profiled lateral sidewalls arranged bilaterally along the direction of movement of the conveyor belt, wherein preferably the edges of the lateral sidewalls are bent inwards; wherein the rearing and/or breeding of insects and/or larval forms of insects concern insects of the orders Coleoptera and/or Diptera; characterized in that the production line further comprises: b) a flow-through feed heating and/or cooling system with a closed flow of heating-cooling medium for heating and/or cooling the feed on the breeding line, wherein the heating and/or cooling system with a closed flow comprises at least one heating-cooling medium supply circuit and at least one heating-cooling medium return circuit connected to each other, wherein the heating-cooling medium supply circuit and the heating-cooling medium return circuit are fluidly connected to a heat exchanger for heating/cooling the heating-cooling medium, wherein the heating-cooling medium supply circuit and the heating-cooling medium return circuit comprise distributors for the heating-cooling medium, wherein heating-cooling pipes of thermally conductive material are connected to the heating-cooling medium distributors via shut-off valves, wherein the heating-cooling pipes of thermally conductive material of the feed heating/cooling system on the breeding line are arranged parallel to the conveyor belt of the said at least one breeding line for laying feed for breeding insects thereon, wherein the heating-cooling pipes of thermally conductive material are arranged along the breeding line for rearing insects and are arranged in at least two rows parallel to each other, wherein the heating-cooling medium supply circuit and the heating-cooling medium return circuit are connected via a three-way valve, and wherein the heating-cooling pipes arranged on and/or under the breeding line form at least two rows of heating-cooling pipes spaced from each other; preferably wherein the production line comprises at least two, preferably several, preferably a dozen, preferably between five and thirty storeys comprising a breeding line with a flow-through feed heating and/or cooling system with a closed flow of the heating/cooling medium; preferably wherein the heating-cooling medium is water or glycol. a) at least one breeding line for breeding insects for laying the feed thereon, wherein the breeding line comprises at least one storey, which constitutes an autonomous conveyor belt, preferably with profiled lateral sidewalls arranged bilaterally along the direction of movement of the conveyor belt, wherein preferably the edges of the lateral sidewalls are bent inwards; wherein the rearing and/or breeding of insects and/or larval forms of insects concern insects of the orders Coleoptera and/or Diptera; characterized in that the production line further comprises: wherein the rearing and/or breeding of insects and/or larval forms of insects concern insects of the orders Coleoptera and/or Diptera; characterized in that the production line further comprises: b) a flow-through feed heating and/or cooling system with a closed flow of heating-cooling medium for heating and/or cooling the feed on the breeding line, wherein the heating and/or cooling system with a closed flow comprises at least one heating-cooling medium supply circuit and at least one heating-cooling medium return circuit connected to each other, wherein the heating-cooling medium supply circuit and the heating-cooling medium return circuit are fluidly connected to a heat exchanger for heating/cooling the heating-cooling medium, wherein the heating-cooling medium supply circuit and the heating-cooling medium return circuit comprise distributors for the heating-cooling medium, wherein heating-cooling pipes of thermally conductive material are connected to the heating-cooling medium distributors via shut-off valves, wherein the heating-cooling pipes of thermally conductive material of the feed heating/cooling system on the breeding line are arranged parallel to the conveyor belt of the said at least one breeding line for laying feed for breeding insects thereon, wherein the heating-cooling pipes of thermally conductive material are arranged along the breeding line for rearing insects and are arranged in at least two rows parallel to each other, wherein the heating-cooling medium supply circuit and the heating-cooling medium return circuit are connected via a three-way valve, and wherein the heating-cooling pipes arranged on and/or under the breeding line form at least two rows of heating-cooling pipes spaced from each other; preferably wherein the production line comprises at least two, preferably several, preferably a dozen, preferably between five and thirty storeys comprising a breeding line with a flow-through feed heating and/or cooling system with a closed flow of the heating/cooling medium; preferably wherein the heating-cooling medium is water or glycol.