The present invention relates to a flower culture device. The flower culture device comprises a greenhouse steel frame, an irrigation device, two heating devices and two air blowers, wherein the greenhouse steel frame comprises a cross beam, seven arched steel bars are uniformly arranged on an upper end face of the cross beam, two ends of the seven arched steel bars are welded symmetrically with two main support rods, two H-shaped supports are welded symmetrically on lower end faces of the two main support rods, an inner wall of each H-shaped support is provided with a first support plate, a second support plate, a third support plate and a fourth support plate from top to bottom in turn, the irrigation device is installed on the greenhouse steel frame, the two heating devices are symmetrically installed on right side lower end faces of the seven arched steel bars, and the two air blowers are disposed right below the two heating devices respectively and are installed on the corresponding first support plates through screws. The flower culture device provided by the present invention can realize functions of automatic quantitative irrigation and const-temperature ventilating culture of flowers, and has the advantages of being simple in operation, high in automation degree, small in labor intensity and high in flower survival rate.