For enhancing the quality of indoor air condition and lowering the risk of indoor living environment to safeguard public health, our government publish the Low of Indoor Air Quality Risk Management which will be implemented on 2012/11/23. This research provides the application strategy through quantitative experiments of how indoor foliage plants can clean indoor air quality under different spectra. This research chooses general indoor foliage plants in Taiwan, like Chinese Alias、Pothos Vine、Hetaeria Cristata, and use 3 different spectra: T8, T5 & halogen lamps for the absorption test of formaldehyde with fixed concentration (by full- scale small-scale chambers),to evaluate the phenomenon of absorption/desorption on formaldehyde under different boundary condition. According to the research result: 1. In the experiment of small-scale chamber, it was found that under different artificial illuminants, the plants had a temporary effect on formaldehyde absorption. That is, in the airtight space, the plants were still capable of temporary absorption, but the effect would vanish as time passed. 2. Plants in chamber, the concentration of formaldehyde is lowest when 100〜150 minutes passed. Then the concentration to rise again as same as beginning. Therefore, the key point is understand the key timing of ones, take it out for desorption, while people employ indoor foliage plant to purify the chemical pollutants, especially closed room. 3. It was found that Chinese Alias significantly absorbed formaldehyde under T8.、Pothos Vine significantly absorbed formaldehyde under T8、and Hetaeria Cristata significantly absorbed formaldehyde under T8 and halogen lamps.