A nursing experience using caring theory to care for the grief experienced by a patient with COVID-19 during their period of isolation from June 4 to June 15, 2021 is described in this article. The patient was assessed using physical, psychological, social, and spiritual framework assessments. Data were collected using care, observation, interviews, and medical records. The healthcare problems were identified as inefficient breathing patterns, anxiety, and grief. The patient transmitted COVID-19 to her father, who subsequently died of related respiratory failure. During the nursing process, we used a mobile application (app) to provide the patient with information about novel coronavirus pneumonia to relieve her anxiety. When the patient was physically unwell, we delivered drugs and oxygen, and provided comfortable prone position and breathing training to resolve her low-efficiency breathing patterns. Also, we cooperated with the psychological and spiritual team to resolve the patient's psychological problems, used hand-painted illustrations and words to provide encouragement, and provided information on the hospital's funeral services provider to help complete her father's funeral arrangements to reduce her sense of grief. It is suggested that, in the clinical care of similar patients, nurses should pay more attention to their psychological problems. In addition, nurses may use the concepts of caring theory to integrate a holistic approach, provide patient-specific resources, and accompanying the patient through the process of grief. This nursing experience may be used as a reference in the future care of similar patients to improve the quality of clinical nursing care.