According to the one aspect of the present disclosure, a method for automated datacenter power management comprises, monitoring a metrics of an entity such as a virtual machine, an application level, a host level and an application platform. The method further comprises forecasting an application power usage by using monitored information from the entity. The monitored information can be but not restricted to a forecasted data, a historical data or a real-time data. Furthermore, the method also comprises the step of applying at least one control to the entity to manage the application power usage. The at least one control can be but not restricted to changing resource pool size at application platform level, changing resource allocations the virtual machine level and changing a processor clock speed at the host level to manage application power usage.