In the article we represented the following items: the mathematical model of the system for automatic control of an in-hive ozone concentration which establishes the connection between the efficiency of the discharging device depending on the temperature of environment and the temperature of dielectric barriers; the functional-block diagram and the algorithm of work of the system for automatic control; the results of investigation of the quality of stabilization of the in-hive ozone concentration; the recommendations for utilization of the results of the investigation