The Serial Device Server that can make serial device be equipped with networking capability instantly. It centrally manages the scattered serial device and hosts via network. Hardware adopts fanless, low power consumption, wide temperature and voltage design and has passed rigorous industrial standard tests, which can suit for the industrial scene environment with harsh requirements for EMC.It can be widely used in PLC control and management, Building Automation System, Health Care Automation System, measuring instrumentand enviromental forces monitoring system.