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High resolution measurements have been performed with a photopyroeleotric (PPE) technique to study the static and dynamic thermal parameters behaviour in the critical region of different liquid and solid samples. In particular the specific heat (c), the thermal diffusivity (D) and the thermal conductivity (k) have been simultaneously determined in the critical region around the antiferromagnetic/paramagnetic (AP) phase transition occurring in FcF: and around the Smeotic-A/Nematic (AN) phase transition occurring in the gS5 liquid crystal.The high resolution of the measuring technique has allowed the determination of the c and D critical exponents and amplitude ratio of their critical terms.