Among 3 different methods of sawmill processing and drying of wood (A - technical drying of fresh sawn timber to the target moisture content of 8 %, B- drying of fresh sawn wood in the open area to the fibre saturation and technical drying elements to target moisture content; C - cutting fresh sawn timber elements and technical elements to the final drying moisture content), the drying times, total energy consumption, specific energy consumption, energy efficiency and energy value of wood residues were compared. Using a new computer programme the influence of different outside parametres on examined values was analyzed. Cutting fresh sawn timber into elements (C), the maximum thermal efficiency, the shortest drying times and the minimum capacity of drying chambers are achieved, but the higher risk and lower calorific value of residue. Most energy consumed in drying of sawn wood (A) also requires the maximum capacity of drying chambers. Implementing drying outdoor extends drying time, substantially reduces total energy consumption and necessary capacity chambers. Selecting proper technology, wood processing and drying, we obtained substantial energy savings (relation between consumed and produced energy is 1 : 7,12).