The Tainan Hydraulics Laboratory is located south of the Civil Engineering Building. While unremarkable on the outside, its interior is exceptional. There are no columns, forming a spacious hall, 30×12 m² in area and 4.6 m in height, for various hydraulic engineering model tests. (This building is now the Historical Gallery of the Department of Civil Engineering, and the building itself is listed as a cultural asset for preservation)

Since its foundation, the Tainan Hydraulics Laboratory has hosted a multitude of experiments and studies regarding hydraulic engineering problems, served as a venue for teaching and practicum in civil engineering, and even undertaken cooperative education projects with the industry to aid in various hydraulic engineering works throughout Taiwan. For instance, the Laboratory worked with the Keelung Harbor Bureau on its outer harbor expansion project in 1957 and constructed a 1/100 model of the outer harbor for tests. This was the first successful experiment completed based on the model scaling theorem in Eastern Asia outside of Japan and was the first successful harbor engineering model test in Taiwan.

The Tainan Hydraulics Laboratory has thus also become a pioneer in hydraulic model research. In the following years, the Laboratory has coordinated with national economic development, solved specific problems, assisted in the completion of major hydraulic and marine engineering projects, and protected the lives and home safety of people in Taiwan.