This study investigates policies and support systems for children with borderline intellectual functioning in out-of-home care, with the aim of identifying strategies to strengthen assistance and improve systemic frameworks. Drawing on a review of domestic and international literature and focus group interviews with practitioners, the analysis highlights key issues in diagnosis and service provision. The findings recommend improving the care infrastructure for children with borderline intellectual functioning in out-of-home placements, amending relevant laws and regulations, establishing differentiated behavioral support systems and professional consulting frameworks tailored to their behavioral characteristics and group-living environments, clarifying the legal roles and functions of individual care management plans, and strengthening the competencies of care workers.