Population exploration causes the high usage of electronic devices such as computer, laptop, and household equipments. So we can save the power and world from the pollution and its unpleasant additional result. Using the Green Computing we can save the power, world., .Green computing means the study and practice of designing ,manufacturing using, and disposing of computers ,servers, and associate subsystem such as printers, monitors etc. The goal of Green computing are similar to green chemistry reduce the use of hazardous materials maximum energy efficiency during the product�s life time and promote the reusability of defunct products and factory waste. Green computing can also develop solutions that offer benefits by �aligning all IT process and practices with the core principles of sustainability which are to reduce, reuse, and recycle and finding innovative ways to use it in business product to deliver sustainability benefits across the enterprise and beyond�.In this thesis, green maturity model for virtualization and its levels are explained �Green Computing,� is especially important and timely: As computing becomes increasingly pervasive, the energy consumption attributable to computing is climbing, despite the clarion call to action to reduce consumption and reverse greenhouse effects. At the same time, the rising cost of energy � due to regulatory measures enforcing a �true cost� of energy coupled with scarcity as finite natural resources are rapidly being diminished � is refocusing IT leaders on efficiency and total cost of ownership, particularly in the context of the world-wide financial crisis.. The Five steps for Green computing for energy conservation.