The light steel factory building with steel structure adopts an efficient and energy-saving system, which has a breathing function and can adjust the indoor air dryness and humidity; The roof has ventilation function, which can create a flowing air space above the interior of the roof, ensuring the ventilation and heat dissipation needs inside the roof. The light steel factory buildings with steel structures are all equipped with high-efficiency energy-saving walls, which have good insulation, heat insulation, and sound insulation effects, and can achieve a 50% energy-saving standard.