Along with the development of computer technology , cloud computation as an emerging computing method of business and ap-plication receives widely attention , and soon after“grid computing”, becomes a bright spot in computer industry .The paper introduces the concept and principle of cloud computation , gives simple analysis , and , combining with an example , expounds some issues need to pay attention as using cloud computation .%随着计算机技术的不断发展，云计算作为一种新兴的商业和应用计算模式受到了行业内外的广泛关注，并且很快成为了“网格计算”之后计算机行业的一个闪光点。文章对云计算的基本概念和原理进行了简单的介绍，对它的基本特征进行了简单地分析，并且借助一个云计算的应用实例分析了在进行云计算使用时需要注意的一些问题。
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