The high-temperature and high-pressure air system mainly provides compressed air for the combustion and turbine test benches. It consists of multiple compressor units and heaters. Through the combination of unit configuration, pipe network back-pressure control, and test bench regulation, the system can achieve continuously adjustable air supply parameters within the ranges of a maximum air supply flow rate of 85 kg/s, a maximum supply pressure of 4 MPa, and a maximum supply temperature of 500 °C, fully meeting the requirements of complex test conditions.