PROBLEM TO BE SOLVED: To provide a greening system by which water for being supplied to a greening structure set up on a folded plate roof is reserved on the folded plate roof. SOLUTION: The greening system 20 is structured as follows: a greening structure 21 and a photovoltaic panel group 31 having at least one photovoltaic panel 33 are set up on a folded plate roof R; a water tank 41 is set up between the folded plate roof R and the photovoltaic panel group 31 while at least part of the water tank 41 is inserted into a roof valley part 7; and a water supply means 51 for supplying water reserved in the water tank 41 to the greening construction 21 is set up. COPYRIGHT: (C)2010,JPO&INPIT
