As the influence of fine dust on society spreads gradually, the public’s interest in indoor air is increasingly rising. Air-purifying plants are drawing keen attention due to their natural purifying function enabled by plant physiology. However, as their fine dust reduction mechanism is limited to adsorption only, vegetation bio-filters that optimize purification effects through integration with air-conditioning systems is rising as an alternative. In accordance with the relevant standard test methods, this study looked into the fine dust reduction assessment method by airconditioning airflow volume that can be used for the industrial spread of vegetation bio-filters. In the case of PM10 at 300 ㎍/㎥, it was in the order of EG-B(3,500CMH, 29 min.)