The authors conducted an experiment to evaluate the heat treating temperature and time effects on Pinus sylvestris wood to control its color.The CIE standard colorimetric system was used to characterize wood color and FT-IR was used to analyze functional groups of the heat-treated wood.The results showed that the color change of the heat-treated Pinus sylvestris wood was primarily attributed to brightness change.As the heat treating temperature and time increased,chromophore groups increased in the wood,which enhanced the wood absorption ability to visible lights,resulting in a darker color and a decreased brightness.The authors suggested that,for industrial operations,wood color could be controlled by adjusting treating temperature,while slight color change could be affected by adjusting treating time.