Walsh's family resilience theory indicated that families could foster resilient outcomes among their members when they are facing changes or crises. However, little is known about family resilience and psychological well-being among Chinese breast cancer survivors and their caregivers. Therefore, this study aimed to examine the direct and indirect relationships between family resilience, breast cancer survivors' post-traumatic growth (PTG), quality of life (QOL), and their principal caregivers' caregiver burden.