1U server chassis is also called the 1u rack-mounted server chassis. The rack mount is suitable for a 19-inch rack, U is a unit that represents the outside height of the server, and 1u means the height of the server chassis is 44.45mm. 1u server chassis is an important part of the server accessories. Its main function is to place and fix each server accessory, which plays a supporting and protecting role. In addition, the computer chassis plays an important role of electromagnetic radiation shielding. It is sconstituted a chassis shell, a bracket, a cooling fan, a hard disk connection board, a hard disk box, a panel, and an indicator light.