This article describes a postpartum woman who was breastfeeding for approximately four months and then was diagnosed with breast cancer. Apart from facing the physical uncomfortableness caused by the surgery, the patient also suffered from great physical and mental impact and stress from worrying about the change of the breast appearance and the dilemma between breastfeeding or not. During the nursing days from November 1 to November 13, the author adopted Gordon 11 Function Health Patterns as an assessment tool and used observing, listening, physical assessment, and looking up medical records to collect data. It was assumed that the patient had acute pain, problem of readiness for enhanced breastfeeding, and health problem like the body image change. During the nursing period, the patient was timely provided with painkillers and non-medical treatment to distract her from pain. Through nursing and health education, the use of family members to provide a good support system, and joint discussion to increase the readiness of breastfeeding, they aim to achieve the continuity of breastfeeding and to implement maternal and child health. In addition, by establishing a good nursing-patient relationship, using the relevant medical team to provide professional information, and providing the correct content of health education, the patient could bravely face the changes in the body and mind and view herself positively, so as to achieve physical and spiritual health. It is suggested that establishing patient-centered integrative care through breast cancer seamless service, integrating medical procedures and precision medicine, and combining multidisciplinary health care staff with clinical treatment can provide the seamless health care service.