In recent years, solving environmental problems have been looked forward from various viewpoints. In the materials development, practical applications of Ecomaterials are desired. Ecomaterials such as Woodceramics is a material in harmony with ecosystem in consideration of material circulation, and is promising for application to various fields such as moisture sensor and electromagnetic shielding materials and so on. To clarify the structure and thermophysical characteristics of Woodceramics, we used Fourier transformation infrared spectrophotometry and elemental analysis to examine the variation due to differences in raw materials and burning temperatures. It is shown that the carbonizing process of Woodceramics can be classified to three ranges, and that the advancement of graphite crystallization starts from around 1073 K of burning temperature.