With the acceleration of urbanization, modern city dwellers are gradually becoming “indoor species”. Due to extended periods in environments that lack natural elements, individuals face health issues such as nature defi ciency, declining indoor air quality, and stress-related mental health problems. Based on the biophilia hypothesis and the healing properties of green plants, this paper reviews the therapeutic benefi ts of indoor green plants as accessible forms of “nature”. It also constructs an indoor green healing system that spans from micro-scale individual spaces to macro-scale public areas, which includes: (1) Scientifi c selection of indoor healing plants should incorporate considerations from three perspectives: environmental adaptability, spatial compatibility, and functional healing properties. This approach ensures that plants can thrive indoors while fulfi lling the functional and therapeutic requirements of the space. (2) Multi-scale indoor green healing system, window greening involves employing techniques such as plant “curtains” and windowsill potted plants to enhance the areas surrounding windows. This approach aims to foster a comfortable indoor environment while encouraging social interaction, relaxation, air purifi cation, and aesthetic improvement. Healing greenery in six types of spaces: tailoring plant selections to residential, offi ce, medical, elderly care, educational, and commercial buildings to address specifi c therapeutic and environmental needs. Indoor healing gardens: Including restorative gardens and enabling gardens designed to support physical recovery, mental relaxation, and emotional well-being through the integration of plants, water features, and sensory elements. Healing landscapes in large public service areas: implementing green healing systems in transportation hubs, commercial complexes, and other large-scale public spaces to improve environmental quality and user experience. The roles aim to rebuild the life connection between humans and nature and enhance the physical and mental health of urban populations.