To investigatetheinfluences of the application of human care theory on the life quality and happiness of cancer patients after they receiveda community nursing care which was implemented by the human care theory. The quality life and the happiness index of 93 patients with cancer living in the six communities in Jillin were assessed, the assessment of the life quality was based on a life quality scale (SF-36) and that of the happiness index was based on Memorial University of Newfoundland Scale of Happiness (MUNSH). The community nurses cared for these patients by applying the theory of human care and the life quality and the happiness index of the patients were observed after the care. The results showed that there were significant differences in the score of 5 dimensions in the eight dimensions of the life quality between before the care and after the care (<0.05), and there were significant differences in the average sores of the positive emotion, positive experience, negative emotion, negative experience and level of happiness included in the happiness index between before the care and after the care (<0.05), suggesting that the theory of human care can be used for the care of patients with cancer and the application of the theory can effectively improve the life quality and the happiness index of the patients, strengthen their problem-solving abilities and let them have a positive attitude towards their lives.