One of the sustainable development goals of sustainable city is to build resilient and safe city assets. Building is one of the key city assets and closely related with circular and sustainable city. Typically, energy and firefighting equipment are key equipment within the building infrastructure, which may affect the safety of people. Currently, many energy and firefighting equipment are separately deployed and managed, so there exist gaps between energy equipment management and firefighting equipment management. This draft Recommendation defines the framework of building infrastructure management system which improves the sustainability of city, particularly building as a city asset. The framework provides a holistic management of building infrastructure. It also presents a service use cases composed of functional elements.