Abstract: The development of the low-altitude economy has given rise to new demands for the integrated utilization of ground and airspace. In urban low-altitude planning, ground-air coordination has become essential for building effective lowaltitude service networks. However, existing research has focused primarily on technical issues and lacks analysis of the elements and implementation pathways from a spatial-organization perspective. Taking drone delivery logistics as an example, this paper, employing a literature review and case study approach, analyzes the elements, characteristics, and implementation pathways of ground-air collaboration, elaborates on the practical challenges, and proposes corresponding planning strategies. The study finds that ground-air coordination is characterized by multi-agent scenario collaboration, multi-target network collaboration, and multi-scale node collaboration. In terms of implementation, it follows a pathway that ranks demand to construct a spectrum of service scenarios, anchors ground-based elements to organize route networks, and integrates node facilities into the built environment. To this end, the study suggests that urban low-altitude planning should identify real needs, promote hierarchical planning, improve airspace control, coordinate route development, innovate management mechanisms, and integrate facilities into a network. These measures can provide the spatial safeguards to advance the coordinated development of ground and air operations.