As a colonial country, the advent of colonialism brought about rapid urbanization and industrialization in Australia. However, it also brings negative impacts. Decolonization is becoming a concern of the people. The research aims to delve into the topic of decolonization efforts in contemporary Australian cities in depth and redefine decolonization from a new perspective. Taking the Ultimo Power Station as an example, this report would draw upon various forms of evidence, such as maps, photographs, interviews, and collages, to analyze the colonial problems, as well as depict and design a vision of the future of decolonization and multiculturalism of Australian urban development. This report analysis the case of Ultimo Power Station in Sydney, providing a lens through which to explore these processes incorporating indigenous design principles and practices into urban and architectural planning and work towards a more equitable paradigm for all groups of peoples, especially the indigenous communities in Australia.