Ecologically sustainable is defined as the maintenance of life support systems to achieve a healthy geophysiological continent, and the achievement of a natural extinction rate (Sutton, 2000). It is also referred to technological improvement and environmental management by Eden in 2006. Most people believe that increasingly population growth in Australia ruins environment. It is urgently to stop and reduce the number of population in order to ecologically sustain our environment. However, at this stage, Australia's population growth must be managed and controlled rather than stopped and reduced if we are to become ecologically sustainable on this continent, as it is not the root of causing unsustainable environment. A bad management in population and inadaptable policies from government are the source of causing land decreasing, forest depleted, water shortage and climate change leading to unbalance environment. Easing and decreasing Australian population growth will minimize market which can lead to another financial crisis. Instead, a superior management in population growth will help to create a healthy environment. A systematic management in Australia's population growth will not only aid in ecologically sustainable, but also act as intangible benefits to boost up our economy on this continent leading to a better living environment for us.