A huge green sea turtle carries our dream and reflection towards a sustainable future. Why are the shining silver carin brine that used to swim freely in the mountain stream, the long-jawed orb-weaver spider and orange lady beetle used to present a healthy and balance ecology on the farm, the kusano willow and cupha erymanthis that we used to see everywhere on the wetland of riverbank, the sparrow disappeared due to urban expansion and alien species of myna, the Indo-Pacific humpback dolphin symbolized the protection of Taiwan in the sea, the pangolin in the lower mountains that becomes nearly extinct because of being caught for medicine and leather making, the dragonfly used to fly freely in the habitat of canal wetland, and the endemic species of emerald green treefrog in Taiwan gradually disappearing? In the Dream Island, several lively and bright environmental indicator living beings are turned into landscape installation arts to link with the global sustainable development goals (SDGs) and tell us the stories among living beings, environment, and cultural activities as well as the urgency of biological and habitat diversity conservation.