A scientific research greenhouse wet curtain cooling device and a control method. A wet curtain of the device adopts a box-type design. An air duct (16) is connected to the bottom of a greenhouse (1), a grid plate (25) is provided in the greenhouse to divide the greenhouse (1) into upper and lower parts. A guide net (4) covers the vertical surface of the box-type wet curtain, and a return tank (15) is provided below the wet curtain. The return tank (15) adopts a large cornice design, so that the dripping of water leaked from the wet curtain is effectively prevented. The feedforward PID control is adopted, and by means of expected feedforward of indoor temperature, the accuracy of natural ventilation cooling and wet curtain fan cooling conversion and the stability of equipment operation are improved. After the device is started, the fan (17) adopts variable frequency control, and the quantity of fresh air flowing into the greenhouse (1) is adjusted to achieve the purpose of precisely regulating indoor temperature of the greenhouse. By means of the bottom positive-pressure air supply design, the effective use area of the greenhouse is increased, and the introduction of greenhouse crop pathogeny and insect sources is reduced.L'invention concerne un dispositif de refroidissement à rideau humide de serre de recherche scientifique et un procédé de commande. Un rideau humide du dispositif adopte une conception de type boîte. Un conduit d'air (16) est relié au fond d'une serre (1), une plaque de grille (25) est disposée dans la serre pour diviser la serre (1) en parties supérieure et inférieure. Un filet de guidage (4) recouvre la surface verticale du rideau humide de type boîte, et un réservoir de retour (15) est disposé en dessous du rideau humide. Le réservoir de retour (15) adopte une conception à grande corniche, de telle sorte que l'égouttement d'eau fuyant du rideau humide est efficacement empêché. La commande PID prédictive est adoptée et, au moyen de l'anticipation
