A Building Management System (BMS) is a system designed to monitor and control the mechanical, electrical, and safety systems in a building. It is typically used to manage the energy efficiency of a building, as well as its comfort, safety, and security. The BMS can be used to control the temperature, lighting, ventilation, and other systems in a building, as well as monitor the energy usage of each system. It can also be used to detect any potential problems in the building, such as a fire or water leak, and alert the appropriate personnel. The BMS is a powerful tool for building owners and managers, as it allows them to maintain the highest levels of safety, comfort, and energy efficiency.