This paper presents the results of temperature measurements using infrared crystalline fibers. An experimental setup is presented, a control scheme with real-time display and monitoring of processes is developed. The obtained results, conclusions and recommendations for the measurements accuracy increase are presented and analyzed. The studies carried out for the first time showed the principal possibility for creating of new temperature sensor types for their use in protection systems, regulating regimes, and for diagnostics of the energy equipment state due to which it is possible to control various equipment elements and, in future, to transit from a preventive repair system to the repair system as of the equipment state. The authors suggest that a more profound study of the infrared fiber thermo-sensor properties can result in a new type of thermal control and its industry-wide application.