Abstract: Data center workloads and renewable energy outputs are random and uncertain. In order to ensure the stability and economy of data center in actual operation,an energy optimal dispatch method of data center microgrid based on stochastic model predictive control is proposed. The scenarios analysis method is introduced to describe the uncertain factors. An optimization model is established with the objective of the lowest operating cost of data center. Through the rolling optimization and feedback correction of model predictive control,the outputs of each system equipment are regulated,which reduce the operating cost and negative impact of uncertain factors on the operation. Taking a typical data center microgrid as an example,the simulation results verify the effectiveness of the proposed method.