Early fire detection and fire alarms is of crucial importance to limit the consequences of a fire, especially regarding the safety of occupants and property protection. The choice of a fire detection system and fire alarms depends on the potential fire source, structure, purpose and use of a building. In public buildings with large crowds, the fire alarm can be completed by emergency voice alarm system, emergency lighting systems and proper EXIT light systems to guide the public quickly to nearest exit. Itqan can determine the most suitable detection and alarm system for each particular building.