DOOOT is an empathetic smart caregiving system designed for elderly individuals living alone and non-professional caregivers. Through flexibly deployable, non-intrusive sensing modules, it captures daily behavioral changes without requiring active user participation. The core of the system lies in understanding. By interpreting behavioral and environmental data, AI establishes a closed-loop process of behavioral sensing, semantic understanding, caregiving guidance, and responsive action—providing a more empathetic caregiving experience while reducing caregivers’ cognitive and emotional burden.