The control device according to the present invention controls a heating device (35, 36) for heating and air-conditioning the inside of an agricultural greenhouse (1). The control device is provided with a computation processing unit (21) and a control output unit (20). Using outdoor air temperature, the computation processing unit calculates a start-up delay time, which is time required after the heating device is started until a temperature rise takes effect and the indoor temperature changes, and predicts, on the basis of the start-up delay time, a future start-up indoor temperature that is to be reached when the start-up delay time has elapsed since the start-up of the heating device. Alternatively, the computation processing unit calculates, using outdoor air temperature, a shut-down delay time, which is time required after the heating device is shut down until a temperature drop takes effect and the indoor temperature changes, and predicts, on the basis of the shut-down delay time, a future shut-down indoor temperature that is to be reached when the shut-down delay time has elapsed since the shut-down of the heating device. The control output unit controls the start-up of the heating device at a start-up timing determined in accordance with the future start-up indoor temperature, and controls the shut-down of the heating device at a shut-down timing determined in accordance with the future shut-down indoor temperature.Le dispositif de commande selon la présente invention commande un dispositif de chauffage (35, 36) permettant de chauffer et de climatiser l'intérieur d'une serre agricole (1). Le dispositif de commande comprend une unité (21) de traitement de calcul et une unité (20) de sortie de commande. À l'aide de la température d'air extérieur, l'unité de traitement de calcul calcule un temps de retard de démarrage, qui est le temps nécessaire après le démarrage du dispositif chauffant jusqu'à ce qu'une augmentation de température prenne effet et les change
