To provide a thin-type greening system enabling planting of tree plants on a thin-type greening base; to provide a thin-type greening system set for the system; and to provide a thin-type greening base body used as a main member of the set.

The thin-type greening system comprises the following: a planting base structure body fixed to attachment bodies 13 implanted via fixing metals while the attachment bodies 13 are projected toward the inside of a thin-type box body 6 from its bottom plate surface, the inside of the box body is subjected to waterproof treatment or internally provided with a waterproof sheet so as to fit the inside of the box body, the attachment bodies pass through a root-proof sheet 8, granular charcoal is spread over the root-proof sheet, thin-type planting mats 10 obtained by wrapping a greening material with a nonwoven cloth or a net sheet are laid on the granular charcoal, and a fixing wire net is put on the mats; a fixing tool for the base part of a root wrapped part; a supporting bar; wire for pressing the root base of the plant; a fixing tool for the periphery of the plant root wrapped part; and trees comprising a root-wrapped part where a root part is wrapped with a cloth-state material together with the soil.