Currently due to the virtualization of the way of money and the role of the bank itself of money transactions being replaced, although the National Bank of Belgium has a huge space, it is difficult to play a role in the current society. In addition to this, this huge banking system not only embodies national capital but also alienates it from its urban context. In the future, the National Bank of Belgium will have fewer employees, how to use the extra space to make this building permeable and maintain it as a symbol of the National Bank? This project aims to transform the traditional space of the bank and add new public spaces open to the public by using the working mode of co-working, so as to provide better working space for different social groups. Besides, my project also provides a new public interior for city dwellers by introducing other public spaces. Through the introduction of different programs. The bank will be turned into a huge collection of workspaces, as well as new containers that can contain various urban activities.