Digital transformation, which improves corporate energy efficiency, is attracting attention in order to realize a sustainable society. In order to realize a system that monitors and controls the power consumption of various devices and realizes power savings for the entire company, it is necessary to manage the whole system requirements for monitoring and controlling the energy consumption of devices.In this paper, we propose an energy requirement management approach based on enterprise architecture. Furthermore, by applying this proposal to energy conservation guidelines for Japanese hospitals, we will demonstrate that it is possible to describe the hospital energy management requirements.