A tree-planting structure device of the present invention comprises: a fixing net (10) formed in a size capable of covering a part of a guard, the ground, or a building outer wall, and having an arrangement of a plurality of meshes； an anchor (20) coupled to the guard, the ground, or the building outer wall in order to fix a position of the fixing net (10)； a plurality of stacking pouches (40), which are sacks coupled to the meshes for forming the fixing net (10) and respectively having plant growing soil contained therein, and are stacked while coming in contact with the fixing net (10)； and hooks, which are members for coupling the stacking pouches (40) to the meshes of the fixing net (10) and connect the stacking pouches (40) and the fixing net (10).
