The present invention discloses a making method for plant root wall to be applied onto a structure surface, which includes the following steps: (A) planting at least one woody plant on a structure surface and (B) configuring at least one rooting guide device on the structure surface, wherein the rooting guide device is separated from the woody plant with a distance. Thus, when the root of the woody plant is growing, the root is guided to grow toward the direction of the rooting guide device and grows along the structure surface to form the plant root wall.一種將植物根群披覆於結構面的製作方法,其中該結構面包括一第一位置與一第二位置,該第一位置高於該第二位置;該方法包括下列步驟:A、種植至少一木本植物於該結構面的第一位置;B、設置至少一誘根裝置於該結構面的第二位置,且該誘根裝置與該木本植物相隔有一距離。藉此,該木本植物之根部在生長時,引誘該根部向該誘根裝置的方向生長,並沿該結構面成長,以披覆於該結構面。S100~S110‧‧‧步驟
