As for bioethanols produced with an unused wood, practical use as one of the renewable energy is expected. In the this study, the abandoned wood-based material was researched and it researched concerning the method of the oxidation decompose by the method of using the photocatalyst with a small environmental impact. The photocatalyst used is a titanium dioxide. Because it is not consumed by the reaction, and catalysis functions to the photocatalyst because of sunlight, it is thought that there is little environmental impact. The decomposition experiment of wood dyes. Moreover, the oxidative decomposition of the saw rubbish can have been able to be done by the photocatalyst and to confirm it.