Abstract: A design method for cloud computing simulation system based on thermodynamic phase space theory was proposed and realized. This method constructs the phase space analysis model of the cloud computing through projecting the information of the cloud computing cluster nodes onto the phase space, turning their parameter variations into the movement of the projected points in the phase space. Then the macroscopic thermodynamic parameter is introduced to reflect the general status of the cloud computing cluster. As per this method, a simulation test platform and a measurement standard are provided for researching on the cloud computing core scheduling algorithm and the operational test of the cloud computing data center. The test results show that cloud computing simulator system which is rebuilt completely has some main advantages as follows. It is easy to build experimental environment and simulation results are intuitive. This system can intuitively reflect the status of cloud computing cluster and the performance of the scheduling algorithm.

Key words: Cloud computing, Parameter phase space, Momentum phase space, Schedule algorithm