Abstract: For controlled aquaculture systems, building is a key facility affecting the stability of indoor environment and energy consumption. A field test building was constructed for evaluating the performance of building envelopes and heating systems at the campus of Zhejiang University, China. The dimensions of the test building were 13.46 m′4.96 m. A total of eight independent units were designed for evaluating hygrothermal performance of envelope in the test building, four units for wall experiment with a dimension of 2.2 m′2.2 m, the other four for roof experiment with a dimension of 2.2 m′4.8 m. The area of solar collector for heating could be changed from 10 to 50 m2, and the indoor temperature of the building could be controlled between 15 to 35 °C. This paper describes the field test facility which can be applied to tests of solar energy and/or heat pump, hygrothermal performance of building envelope, wastewater heat recovery, freshwater heating, and air heating.