The present invention relates to a method for landscaping a lake by using an artificial waterweed island, and to an artificial waterweed island produced through the same. A separate floating body or a structure is not needed, and thus a structure is simplified, thereby ensuring economical feasibility. Even when a plant is planted to a vegetation base, the plant can autonomously root to the vegetation base without having to forming multiple root penetration holes one by one in the vegetation base. Thus, the root of the plant is strongly supported, and convenience and efficiency of a vegetation operation can be ensured. A floating material on water is adsorbed through the vegetation substrate, so an excellent purification ability and an excellent capability to supply nutrients and minerals to a plant can be ensured. The method comprises: a vegetation step of floating a vegetation base made of a compressed carbonized cork plate on water to absorb water thereto, cutting roots and stems of a water plant to be vegetated into the same length, putting the plant on the vegetation base on water, and waiting until roots find and root pores of the vegetation base a support frame preparation step of surrounding the outer circumference of the vegetation base on which the water plant is planted through the vegetation step, and preparing a frame-shaped support frame having penetrated top and bottom sides, wherein the support frame is made of a material which is not decomposed or changed by water and a construction step of transporting the vegetation base having the plant planted thereon to a river or a lake to be floated on water, wrapping the support frame prepared through the support frame preparation step on the outside of the vegetation base, and connecting gaps between the support frame into a desired shape of an island.COPYRIGHT KIPO 2017본 발명은 별도의 부력체나 구조체가 불필요하여 구조의 단순화에 따른 경제성을 확보할 수 있고, 식물을 식재기반에 심을 때에도 식재기반에 일일이 뿌리관통홀을 다수 형성할 필요없이 식물 스스로 식재기반에 뿌리를 내릴 수 있도록 하여 식물의 뿌리를 견고하게
