臺南從17世紀開始經歷了許多列強佔據，分別經歷荷蘭、明鄭、清治、日治及戰後時期，每個時期皆會遺留下許多的文化資產，然而隨著時代之演進地表上之歷史結構都已消失，僅留部分基礎埋藏於原址。近年文化意識抬頭，這些被深埋於地下之遺構也逐漸成為瞭解過往歷史真相的重要依據之一，要使地下遺構重見天日，首先要確實掌握地底下遺構的位置及其分佈，此時非破壞檢測是良好的方法之一。
本研究使用非破壞檢測之透地雷達來進行地下結構之調查，其中本研究調查的地下探測場址包括①原成功大學水質室地下水槽之建築現為成功大學土木系系史館與軌道館乃是為了瞭解室內地板下方地下水槽的範圍及深度、②原清朝之台灣府城大北門城牆遺構之基地以瞭解大北門甕城及大北門的城垣的位置，做為將來基地開發時規畫設計之參考，以及③在今台南安平原荷蘭時期之熱蘭遮城稜堡之空地以瞭解城牆的位置及延伸方向，以供考古試掘選擇挖掘位置的參考及出土物的對照。
研究流程大致先以透地雷達進行探測，在按圖徵判釋出地下埋藏物之狀況並與測區之舊有文獻紀錄或古地圖等進行綜合推斷來判定地下遺址結構之位置，如有考古試坑也會藉由開挖試坑來驗證透地雷達在探測遺址之適用性，再透過已開挖區以及其他殘存遺構來推測周遭未開挖之地下結構位置。

Tainan has been occupied by many foreign powers since the 17th century, including the Dutch, Ming and Zheng, Qing, Japanese and post-war periods. Each period will leave behind a lot of cultural assets. However, with the evolution of the times, the historical structure on the surface All have disappeared, leaving only part of the foundation buried in the original site. In recent years, cultural awareness has risen, and these deeply buried remains have gradually become one of the important bases for understanding the truth of the past. To bring the underground remains to the light of day, first of all, we must truly grasp the location and distribution of the underground remains. At this time, non-destructive testing is one of the good ways.
This study uses non-destructive detection ground-penetrating radar to investigate underground structures. The underground detection sites investigated in this study include: ① The building of the underground water tank of the former National Cheng Kung University Hydraulics Laboratory is now the National Cheng Kung University Department of Civil Engineering History Department and Railway Technology Research Lab. In order to understand the range and depth of the underground water tank under the indoor floor, ② the subsurface ruins of the Great North Gate of the Qing Dynasty to understand the location of barbican of the Great North Gate, as a reference for the planning and design of the future base development, and ③ The location and extension direction of the city wall were found in the open space of the bastion of Fort Zeelandia in the Dutch period in the Tainan Anping , for the reference of archaeological trial excavation to select the excavation location and the comparison of the unearthed objects.
The research process is roughly first to use ground-penetrating radar for detection, and then to determine the status of the underground buried objects according to the map, and to make comprehensive inferences with the old documentary records or ancient maps in the survey area to determine the location of the underground site structure. The test pit will also verify the applicability of ground-penetrating radar in detecting the site by excavating the test pit, and then infer the location of the surrounding unexcavated underground structures through the excavated area and other remnants.

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