With the changes in global environment, various countries encountering problems relate to drop in birth rates, rising in adult death rate, increase in non-communicable disease, and aging society. The key to lay a solid foundation for the country's sustainable development is the plan to create “Healthy Cities”. Given Taiwan’s diverse environment, experts and scholars from various fields gathered in the "2019 Global Health and Sustainable Development Forum" to share the secrets of development of “Healthy Cities”.