The purpose of this paper is to study the effect of S.trifasciatavar.laurentii (variegated snake plant) on indoor environment. The results showed experimental room with three pots of S.trifasciatavar.laurentii was 1.6% higher in the room air relative humidity, 0.997℃ lower in temperature, 15.5% lower in PM2.5 concen-tration, 16.4% lower in PM10 concentration than the control room.