Fine dust can affect the lungs and bronchi of humans, and can even lead to death in severe cases. Accordingly, the Basic Law on Environmental Policies was enacted in order to strengthen the current standards and annual average standards of fine dust (PM-2.5) in accordance with the World Health Organization"s designation of carcinogens. Similarly, the severity of fine dust and extremely fine dust is highlighted in Korea. On the other hand, the recommended standards for ultrafine dust under the Indoor Air Quality Control Act are not revised. In this case, this study analyzes the indoor air quality by directly measuring CO₂, ultrafine dust and fine dust using measuring equipment at the field station.