由于地下空间开发的不可逆性,为使城市可持续发展,地下空间开发应当合理调研、规划及管理。在大多数城市，由于缺乏地下空间整体开发利用规划，没有相应的明确政策和行政指引，开发引导因素不足，导致地下空间开发往往形成相对单一独立的项目。在亚洲2个人口密集城市--香港和新加坡的地下空间开发经验的基础上，审视地下空间开发经常被忽视但益发重要的课题，这就是如何通过城市规划设计，发挥地下空间资源协调和平衡利用。

Due to their irreversible nature, the development of underground spaces should be properly investigated, planned and managed in order to contribute to sustainable development in cities. In many cities, there is a lack of a holistic planning approach with clear policy and supportive administrative guidelines to utilize this alternative spatial solution, resulting in lack of incentives with underground development projects often being carried out on singleproject basis. Tapping the experience in two densely populated cities in Asia, Hong Kong and Singapore, this paper therefore aims to examine the significant, yet often neglected, urban planning and design issues relating to the development of underground spaces for coordinated and balanced utilization of this underground spatial resource. 