PROBLEM TO BE SOLVED: To provide a rooftop garden system in a flat roof of a building, capable of effectively utilizing a part other than a planting part of a rooftop of the flat roof of the building as a living space while retaining a waterproof function in the rooftop, and permitting easy replacement of the part to be utilized as the living space with the planting part.;SOLUTION: In the rooftop garden system of the flat roof of the building, a waterproofed layer is formed on top of the flat roof of the building, and the planting part is formed on the top of the waterproofed layer. The planting part is disposed in a region on the top of the waterproofed layer, and a spreading plate is spread on the other region on top of the waterproofed layer to form a non-planted region. The planting part is formed by setting an edge frame around a planting base. The edge frame and the planting base are detachable from the top of the waterproofed layer, and the spreading plate is also detachable from the top of the waterproofed layer.;COPYRIGHT: (C)2012,JPO&INPIT
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