It is well known that the daily life of cancer patients is limited, their life skills are decreased significantly, their social activities are reduced, they are always lack of in-terpersonal communications and emotional support, and often show a negative attitude to the present life, and moreover, the disease can cause the decrease in their body resistances to directly affect the life quality of them and the happiness index. Community nurses applied the human care theory to give a respect to the personality of the patients and look after the m with a personalized care, which can give the patients an individualized treatment. The care emphasized on patient-centered and the service for the clients with love, patience and in an all-around way, which could improve the life quality of patients with cancer significantly. The results in this study showed that compared with those before the implementa-tion, there were significant differences in the factors which can be used to assess the life quality of patients with cancer, such as the physiological performance, so-cial function, emotional function, mental health and vi-tality after the implementation of the human care theory (p < 0.05), there was no significant difference in physio-logical function, general health and body pain (p > 0.05), and the happiness index of the patients was significantly elevated after the implementation of the human care theory. Therefore, the theory and the method of human care should be applied universally, and all nurses should understand the meaning of human care theory and the knowledge of human care in their future work. It is be-lieved that the application of the human care theory will be a new development in nursing