Server chassis is an important part of the server accessories. Its main function is to place and fix the server accessories, support and protect the motherboard, board card, power supply and so on. In addition, server chassis has an important role in the shielding of electromagnetic radiation. It is sconstituted a chassis shell, a bracket, a cooling fan, a hard disk connection board, a hard disk box, a panel, a switch, and an indicator light. Server chassis include rack-mounted server chassis, tower chassis, and blade server chassis.