Studies show that adding essential oils every 2 hours can maintain the fragrance. In order to solve the inconvenience of manually adding, we integrate the diffuser and essential oil bottle into one to realize the automation of adding essential oils. It frees user's hands, improves the interactive experience as well as the aromatherapy effect. Users can select the concentration as their desire. The diffuser with a 500ml water tank serves 12-hours continuous working time. It automatically adds the essential oil to the water tank every 2 hours and stops adding after 8 hours to avoid waste. 3 timing modes and 8 light colors meet the needs.