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Energy efficiency is one of the most important issues for large-scale server systems in current cloud computing. the main method about the power-performance tradeoff by fixing one factor and minimizing the other, from the perspective of optimal load distribution. However, there still exist several main challenges about Energy efficiency due to the complexities of real cloud computing application scene. The paper adopts machine learning theory to save energy consumption by decrease redundant computation for high energy-efficiency cloud computing environment. give the typical k-means and Page Rank applications, the Experiments show that the presented algorithm can save power consumption apparently. The research combines the machine learning theory and distributed technology, and presents a creative way to challenged problems in energy-efficiency cloud.