Green computing concept is to improve environmental condition. The main aim of green computing is to reduce poisonous materials. We systematically analyze its energy consumption which is based on types of services and obtain the conditions to facilitate green computing to save overall energy consumption in this system. Today it is the major issue to prepare such equipments by which we achieve efficient energy and to minimize of e-waste and use of non poisonous chemicals / materials in preparation of e-equipments. We can implement green computing in computer’s fields as CPU servers and other peripheral devices (mobile devices). By using green computing we can reduce resources consumption and disposal of electric waste (e-waste). The other poisonous materials which are used in computer/electronics industry are also harmful for environment. In this paper, we will involve widely survey the concepts and architecture of green computing, as well as its heat and energy consumption issues. Green computing can facilitate us to safe, secure place and healthy environment all over in the world. This paper will help us to take some initiatives currently under in the field of computers/electronics industry and new ways to save vast amounts of energy which is wasted in very large scale.