The design of the refrigeration system is an important part of the optimization management of the computer center

which also has a direct impact on the stable operation of the internal equipment. In this paper indoor temperature was measured with the traditional measurement method

and the fluid field and temperature field were simulated by computational dynamics fluid (CFD) method. The numerical results are in agreement with the experimental results to within the relative error of 0.22%

which ensures the reliability and lays a foundation for the further analysis of the air distribution. The results indicate that the vortex has important influence on the temperature distribution; and cooling rate in the vortex region is lower about 25% compared with the adjacent.