With the rapid development of cloud computing data centers, the problems of tremendous power consumption has become increasingly prominent, so it is of great practical significance to study the energy efficiency of cloud computing green data center. This paper proposes a mathematical model based on the constraint of QoS which combines benefits and costs, the model takes account some factors including electricity price, renewable power generation, service rate and Qos. Finally clustering

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... m is applied to the data center task scheduling mechanism to reduce data center energy consumption and increase efficiency.