The microwave temperature sounding (MWTS) is a multi-channel passive microwave radiometer. It is designed for Chinese meteorology satellite (FY-3), which is in a circular sun synchronous orbit. As an introduction, this paper describes the operational and functional parameters of MWTS. The system consists of antenna subsystem, receive subsystem, signal processing and control subsystem, calibration subsystem, mechanical scanning subsystem, etc. The MWTS consists of four channels with channels center at 50.30 GHz, 53.596 GHz, 54.94 GHz and 57.29 GHz. It can provide a vertical temperature profile of the atmosphere.