Abstract: In the context of urbanization, the increasing population of stray cats has heightened public health risks, ecological concerns, and human-cat conflicts. Traditional "human-centered" architectural designs often fail to address cross-species coexistence. This study proposes a "human-cat shared space" framework based on three core goals: functional integration, balancing needs, and fostering community belonging. Through a combination of vertical layering, facility nesting, and path guidance, the design incorporates underground cat tunnels, ground-level movement separation using reflective barriers and plant cues, and integrated human seating with cat shelters. The system also includes private refuges, semi-open interaction zones, and elevated walkways, forming a "mutually friendly interface." Findings indicate that this approach reduces spatial conflicts, lowers public health risks, improves cat welfare, and enhances community governance, offering a model for cross-species spatial design and inclusive urban development.