In recent years, sharing economy, also known as collaborative consumption, collaborative economy or peer economy, has risen in various places and more new companies or platforms have developed and become more popular. For example, Airbnb provides short-term accommodation, Uber has developed a mobile application that allows consumers to submit a trip request which is then routed to Uber drivers who use their own cars. We will explore how sharing economy affects the 21st century lifestyles, how it works in our real life and compare the sharing economy in Hong Kong with those in other Asian cities. Moreover, we would like to promote the awareness of sharing economy. People can use their underutilized resources more efficiently, which can promote the sustainable development in the society. It makes the redistribution of resources more efficient and helps reduce wasted resources. In the project, we will talk about what the status of sharing economy in Hong Kong is. We will analyze the stances of different stakeholders, including the government, residents, social groups and enterprises. We will also find out why they support or oppose to it and what benefits they can get from sharing economy. We will know more about how sharing economy help sustainable development and how sustainable development influences us to engage in sharing economy. At last, we will share the experience of some social actions we have participated in. We joined some sharing economy activities that organized by other groups, including collecting leftovers from market and also collecting useful materials from the flower market during Lunar New Year. After joining these activities, we organized a barter activity on school fun day to promote sharing economy to our schoolmates.