The paper presents a thermodynamic model reflecting interrelation of information and energy characteristics pertaining to the process of an intellectual sensor system operation. Sequence of parameter transformations has been analyzed in the process of sensor control while using the sensor with self-generation and without it. It has been shown that while executing high-accuracy control data amount is determined by relative accuracy algorithm and while carrying out rough control of physical values the given parameter depends on relative accuracy square. The paper contains a dependence of enthropy efficiency value of sensor control on its relative error. Evaluation of energy complexity pertaining to the execution of the given procedure has been analyzed for thermodynamic model of sensor data processing. The paper proposes a thermodynamic model where an input signal is realized in the form of separate energy abrupt changes and reveals the possibilities to reduce energy complexity of data process in the sensor contro