It wasn't until the Ministry of the Interior undertook a census of archaeological sites in Taiwan that the Chienshan site was recognized as a late Neolithic site roughly contemporaneous with the late Yuanshan culture and the early Botanical Garden culture. The MOI rated it a 3.5 on a four-point scale in terms of its importance as a cultural property, a level equivalent to a class ='Qword'>Class One National Historic Site.
直到民國 93 年，行政院內政部進行「台閩地區考古遺址普查研究計劃」，才發現大園尖山遺址類型屬於台灣新石器時代晚期、接近圓山文晚期與植物園文化早期的遺跡，其文化資產評鑑等級高達 3.5（最高為 4 級），「價值」相當於國家一級古蹟。