Construction materials used for a new building are complex substances wood materials and it is being investigated that they emit various chemicals such as Formaldehyde, TVOC, etc. and deteriorate the quality of indoor air. These toxic substances cause the symptom like Sick Building Syndrome(SBS) and Sick House Syndrome(SHS), etc. Therefore, this study examine the emission characteristic of Formaldehyde and TVOC based on the elapsed period for each grade for an effective improvement by selecting the typical wood materials(PB, MDF) that can affect the quality of indoor air as a target. Also, it investigated the emission ingredients of an individual VOCs substance and grasped the main pollution materials. As a result, PB and MDF of Formaldehyde and TVOC showed a different emission characteristic each other, and emission concentration of MDF was higher than PB. This is the kind of raw material and is grasp by the amount of adhesive. It is decided that elapsed period considering the characteristic of each raw materials is necessary because the emission concentration is different respectively like this. In addition, based on seven days, PB was emitted much in order of Toluene, 1,3,5-Trimethylbenzene, N-Pentadecane and MDF was emitted in order of N-pentadecane, Toluene.