The present invention relates to a rooftop greening method using an ecological block, and more particularly, a main body comprising a water supply member having a water permeability and a water repellent function at an upper portion, a support portion supporting the water supply member, and a water storage function. Installing the ecological block made of the structure on the rooftop, and the step of planting the plant after the vegetation soil to a certain thickness on the ecological block.;When the roof is recorded with the present invention, it is not necessary to waterproof the floor, and thus it can be conveniently installed at low cost. Water can be supplied without waste, and the amount of water can be controlled by supplying and draining the water in the ecological block water storage unit, which enables convenient tree management after construction.;Ecological block, roof greening, water supply member, vegetation soil
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