We proposed that postgastrectomy cancer patients with organ deficit were xu zheng, or of deficient constitution, and administered bu ji or supplementary regimen to them. With alleviation of the symptoms, our diagnosis seemed correct from the traditional medicine perspective. Interleukin 2 reactivity, natural killer activity, nutritional index and bone mineral indices also improved. Such results suggest that our diagnosis was also correct according to Western medical theory. In addition, nutrition seemed to have positive relationship with NK activity and bone mineral content. Therefore, administration of bu ji seemed useful to improve the quality of life of postoperative cancer patients.