Design of Magnet Temperature in the CSR Measurement and Control System Wang xiaoyin1,2 ,Wang yanyu1,Jiangfeng1 (1.Institute of Modern physics, the Chinese Academy of Sciences, Lanzhou 730000,China; 2.Graduate School, the Chinese Academy of Sciences, Beijing 100039,China) Abstract: A monitor and control instrument of temperature used in magnet of CSR was be studied in this paper. This instrument was based on Msp430F449 , the hardware and software was introduce particularly. It has the characteristics of strong function, low cost, low power, high reliability, strong noise resistances, and may be applied in many temperature measurement an control system. Key Words: MSP430, Temperature,Measurement and Control System