Fans play a crucial role in the shipbuilding industry as they provide ventilation and air exchange, as well as ensure process safety. They are integrated into core aspects such as hull construction, cabin environment control, and power system maintenance. In large shipyards, explosion-proof high-pressure centrifugal fans continuously supply fresh air to the welding operation area. Their special spark-catching device effectively prevents the risk of flammable gas accumulation and ensures the safety of enclosed space operations. The ship coating workshop is equipped with an anti-corrosion fan system, which processes paint volatiles through multiple layers of filtration, with a VOCs removal efficiency of over 95%. It also maintains a constant negative pressure environment in the sandblasting room. The ventilation system in the engine room uses stainless steel fans resistant to salt spray corrosion, with a variable frequency control system for intelligent air volume adjustment, ensuring optimal air supply for diesel engine operation. The cargo pump room of liquefied gas transport ships uses ATEX-certified explosion-proof fans, with a dual backup design to maintain methane concentration below the explosion limit in extreme conditions. Modern shipbuilding incorporates a digital fan management system, which uses sensor networks to monitor parameters such as wind pressure, temperature, and humidity in each cabin in real time. It is linked with the shipbuilding CAD system to achieve simulation optimization of airflow organization. In submarine manufacturing, special fans adopt acoustic stealth design, and their unique muffler structure can control operating noise below 35 decibels. With the promotion of green shipbuilding concepts, new-generation marine fans integrate energy recovery technology, achieving thermal energy reuse in the ship's exhaust gas treatment process, with an energy efficiency increase of 30%. The development of intelligent ships in the future will drive the deep integration of IoT technology in the fan system. Through digital twins, remote fault diagnosis will be possible. The application of artificial intelligence algorithms will enable fans to automatically optimize operating strategies in complex sea conditions, providing reliable environmental guarantee solutions for the intelligent transformation of shipbuilding.