The main goal of this work is to explore and process the alarm systems that are present in thermal power plants, as well as their connection with the highest quality implementation of the overall safety and efficiency of plant operation. Since thermal power plants use complex work processes and work equipment, there is a high risk of operational and safety irregularities. Precisely for this reason, the implementation of these systems is carried out by detailed coverage and supervision of all areas that represent a safety risk, i.e. the possibility of some form of accident or incident. Covering such areas is done with sensors or detectors, which use signals to travel from the location of detection of irregularities to the alarm control center, which processes incoming signals, and if it is a potential danger, they activate the alarm, i.e. they give a visual and audible signal to alarm managers and all plant staff. There are many alarm systems in the thermal power plant, and according to their purpose, they can be divided into alarm systems of : general safety, work equipment, work process, anti-burglary and environmental protection (environmental alarms). In order for the alarm manager's response to the alarm system to be as quick and efficient as possible, training is carried out, which emphasizes the method of use, determining the priority of the alarm, the very limits of alarm activation, and the measures taken depending on the priority of the alarm. When an alarm is activated, it is important to determine the ways of responding to potential danger with intervention measures and protocols, and this is achieved through further coordination, communication and the use of prescribed equipment to prevent the occurrence of an accident, because these categories are closely related to alarm systems. More precisely, without an alarm notification, responses to crisis situations would be too late and not so efficient.