Objectives. This research with gastrointestinal cancer patients analyzed the expected outcomes of nursing interventions on a) patient adherence to treatment; b) patient satisfaction with nursing care; and c) health of body conditions such as lung function. Methods. All patients (60 individuals) who underwent chemotherapy at The First Affiliated Hospital of Soochow University, Department of Traditional Chinese Medicine, were divided into two equal groups. Group 1 received planned care and Group 2 received evidence-based nursing interventions. Results. The results showed that treatment adherence was higher in Group 2 than in the control group (p = 0.01). In addition, there was a higher rating by patients for the quality of nursing care (p = 0.01), as well as a higher score obtained for lung function (p = 0.01). Treatment adherence resulted in a decrease in the secondary infection rate in Group 2 (p = 0.05). Conclusion. The results showed that quality nursing intervention is effective for lung function improvement, stress level reduction, treatment plans, and a reduction of secondary infections. Keywords: cancer, nursing care, quality of life, lung function, commitment to treatment, secondary infection