  The stochastic model that describes radiative heat transfer in dielectric
medium is built. The model is based on the representation that heat transfer is
realized both by heat conductivity mechanism in it and due to the
electromagnetic radiation that is generated by thermal fluctuations of atoms in
the medium. Using the fluctuation-dissipative theorem, on the basis of such
physical suppositions, the stochastic model is formulated in the form of the
infinite dimensional Ornstein-Uhlenbeck process that describes medium
fluctuations. In the model frameworks, the energy flux density of fluctuating
electromagnetic field is calculated in the form of the functional of
temperature distribution in three-dimensional medium sample.
