A plant cultivation room provided with a plant cultivation area and an illumination lamp for irradiating light onto the upper surface side thereof, wherein at least a portion of the inner surface of the plant cultivation room comprises of a plant cultivation room inner surface constituent member composed of a material containing a far-infrared emission substance that emits and absorbs far-infrared and in which the emissivity of far-infrared is 0.6 or higher, and the surface of the illumination lamp has a coating layer containing the same far-infrared emission substance as the far-infrared emission substance of the plant cultivation room inner surface constituent member and is provided with a cooling and/or heating source having a cooling and/or heating surface composed of a material containing the same far-infrared emission substance as the far-infrared emission substance of the plant cultivation room inner surface constituent member. When the cooling surface of the cooling source is cooled, the far-infrared emission substance of the cooling surface absorbs far-infrared emitted by the plant cultivation room inner surface constituent member and the far-infrared emission substance of the illumination lamp. Also, when the heating surface of the heating source is heated, the far-infrared emission substance of the plant cultivation room inner surface constituent member and the illumination lamp absorb the far-infrared emitted by the far-infrared emission substance of the heating surface. In accordance with the present invention, it is possible to provide a plant cultivation system in a plant cultivation device having a temperature-regulating system with excellent comfort for both plants and workers, and with very high energy efficiency in a cultivation room space such as a plant factory.L'invention concerne une chambre de culture de plante, comprenant une zone de culture de plante et une lampe d'éclairage pour rayonner une lumière sur son côté de surface supérieure, au m
