A Building Management System (BMS), otherwise known as a building automation system (BAS), is a computer-based control system installed in buildings that controls and monitors the building's mechanical and electrical equipment such as ventilation, lighting, power systems, fire systems, and security systems. Intelligent building management systems IBMS. Intelligent building management systems (IBMS) are used to manage the technology involved in modern buildings. Reduce the energy consumption and carbon footprint of the building and Maintain infrastructure.