The lumen instrument dryer is the best combination of an endoscope plasma sterilizer. Compared with the cold air and the gas with water blown by the traditional ordinary air gun, the lumen instrument dryer can blow dry gas with high temperature and pressure up to 99 ℃. It can quickly dry the surface of the endoscope, and the lumen instrument dryer can thoroughly dry the inside of the pipe, thus ensuring the success rate of the endoscope in plasma sterilization, greatly improving the efficiency of the staff and the loss caused by the failure of plasma sterilization.