Now-a-days clouds are used by every organization either it is related to IT sector or not, it is large scale or small scale industry. Because it has a lots of advantages. Today no organization can think heir communication without this. so before to adopt this technology every organization must think their merit and demerits like cost, security, estalibiment etc. In this paper, the author will explain the cost, security and implementation in cloud atmosphere and in traditional environment and also list the common and uncommon think between these concepts.