Using the panel of a green a building a highest structure setting at constructibility and economic effect is improved by forming the roof of a building, not will use an armoured concrete slab, easily varied after construction and remove a highest structure. A highest structure using a building of the panel of a green includes a support (12), it is vertically mounted, on top layer's layer of a building, one is framed in the upper water level land installation of support, the panel (15) of multiple greens is continuously provided and is horizontally architecturally formed the bottom of a garret of building, and the water route (16) provided between the panel of green lets the outside in a space in the place that the panel that the top of green panel is used in machine watering to green is mounted fly away side by side.
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