迎接雲端運算時代的來臨，因應大量雲端運算的需求，提供雲端服務的資訊業者紛紛在世界各地擴建其雲端資料中心，如微軟陸續在世界各地投資擴建所需的雲端資料中心，同時以每月1萬台伺服器的速度在成長。雲端資料中心要能夠容納高密度的伺服器及網路設備，散熱與節能設計將會是雲端資料中心首要的考量。
欲提升雲端資料中心用電效率，達到節能目標，必需了解雲端資料中心電力使用分佈狀況，再針對占雲端資料中用電量最大比率的部份進行用電效率的提升，如此才是最有效率且符合經濟效益的做法。勞倫斯伯克利國家實驗室 (Lawrence Berkeley National Laboratory, LBNL) 指出，資訊設備、暖氣通風空調設備 (Heating, Ventilating, and Air Condition, HVAC) 、暖氣通風空調設備的風扇 (HVAC Fans) 占資料中心用電量前三名，分別占資料中心用電量的46%、23%及8% (Tschudi, 2010) ，其中暖氣通風空調設備及暖氣通風空調設備的風扇均屬於空調系統，因此要提升雲端資料中心用電效率，達到節能目標，建議可以從電腦機房空間規劃、空調系統節能規劃、伺服器節能規劃及資料中心管理規劃等四方面進行。
本研究以微軟雲端資料中心為例，探討如何規劃電腦機房空間、空調系統節能、伺服器節能以及如何進行日常雲端資料中心維運管理，達到電力使用效率 (Power Usage Effectiveness, PUE ) 值為 1.2－1.5高效能的雲端資料中心。本研究結果可提供其它企業或學術單位進行雲端資料中心節能規劃時的參考。

The cloud service will become more and more popular in the next few years, so the cloud service providers have to build many datacenters worldwide to fulfill massive service requests. For example, Microsoft gradually invests a lot of resources in building and expending cloud data centers around the world and its servers are growing ten thousands per month in worldwide cloud datacenters. The primary considerations for a cloud datacenter are cooling and power saving plans as the center has to accommodate a high density of servers and network equipments.
The most efficient and economical method for power saving is to improve the efficiency of power usage in cloud computing data centers and meet the goal of power usage reduction. We must first understand how power is used throughout the facility, and focus the efficiency-improving efforts on the sections that consume the most power. The Lawrence Berkeley National Laboratory (LBNL) pointed out that IT equipment, heating, ventilation, and air conditioning (HVAC), and HVAC fans are the top three power consuming elements of the data center, using 46%, 23%, and 8%, respectively. As the HVAC and HVAC fans are parts of the air conditioning system, if we are able to improve the power consumption efficiency and meet the reduction goals, new layouts and power reduction strategies should be implemented in the server room, air conditioning systems, servers, as well as revamped management policies for the data center facility.
In this study, we discuss how to plan computing rooms, power saving for air conditioning and servers and how to maintain cloud datacenter to achieve PUE 1.2-1.5, the goal of cloud datacenter energy efficiency. The enterprises and academic institutions can refer to this research when planning their energy-saving strategies for cloud datacenters.

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