OBJECTIVE : This study aimed to evaluate the effectiveness of Baduanjin exercise, which is a traditional Chinese Qigong exercise, in breast cancer survivors to assess its efficacy for physical and psychological rehabilitation. METHODS : The study was a single-blinded randomized controlled trial. Eighty-six subjects were randomly assigned to the intervention (n = 46) or control (n = 40) groups. The intervention group received Baduanjin exercise 3 days/week at hospital and another 4 days/week at home for 6 months, whereas the control group were requested to maintain their original physical activity. Outcomes included body mass index (BMI), heart rate variability, lung capacity, arm circumference, shoulder range of motion, step test index, anxiety, depression, and quality of life (QOL). RESULTS : After 6 months of intervention, heart rate variability and shoulder range of motion were significantly improved in the Baduanjin group compared to the control group (P < 0.05). There were also significant improvements in depression, QOL, and four QOL dimension scores (physical well-being, social well-being, functional well-being, and breast cancer subscale) (P < 0.05). However, there were no differences in the BMI, lung capacity, arm circumference, step test index, anxiety, and the emotional well-being QOL dimension scores. CONCLUSIONS : Our findings indicate that Baduanjin is an effective intervention for improving physical and psychological health outcomes among breast cancer survivors, which is worth recommending and implementing by oncology nurses for breast cancer survivors during their long rehabilitation journeys.