In 2011, because of heavy rainfall, debris flow generated by landslide occurred losses of both life and property in Mt. WooMyun which is located in Seoul. Thus slope repair methods from civil engineering such as debris barrier, soil nailing, retaining wall, gabion wall, check dam, revetment, and rill control structures were applied collectively to repair it. Therefore we like to use it as a study data of repair works regarding landslide and debris flow that will occur later in urban area through analyzing repair works and method of construction around the Mt. WooMyun.