Adoption of Cyber-Physical System is inevitable in upcoming times owing to its potential coverage of various physical devices operated by computational algorithms. However, constructing a robust application structure for dynamically supporting the uncertain network is a big challenge to Cyber-Physical System. Out of various forms of inherent problems associated with proper operation of physical devices in such system, one of the biggest impediments towards this can be stated as an energy efficiency problem as the physical devices are basically a low-powered and limited resources sensors and actuators. Therefore, this manuscript discusses about the existing trends of the solution presented in current era in order to address the energy efficiency problem in Cyber-Physical System. The massive growth of energy consumption by buildings and release of huge amount of carbon footprints by resources such as air conditioners motivated to develop ecofriendly solutions for temperature monitoring. As a result task scheduling has drawn attention in which limited resources can be efficiently utilized to consume less energy. In this paper, we compare different scheduling policies in terms of energy efficiency for room temperature monitoring. Finally, a solution is provided to efficiently reduce the energy consumption.