Urban greenery brings both physical and mental wellness to dwellers, as supported by researches in the field of psychology and architecture. The design of urban green space has become a heated topic ever since the completion of Central Park in New York in 1860s. Facing urbanization of unprecedented speed and scale, contemporary discussion around urban green space is oriented towards its role in high-dense cities. In what scale and what form urban green space should be implemented as an infrastructure worth further inquiry. In a defined historical and geographical context, the topic of this issue takes a more intimate perspective into urban dweller's needs, and centers on the multiple dimensions of green space practices. Architects, planners, authorities, developers, scholar, NGOs, artists and media all contribute to this issue by sharing their observations, studies, and practical experiences of urban green space design in the global and local context, providing a cross-disciplinary and multi-participant scope into the discourse.