In Taiwan, population aging has triggered a constant rise in the incidence of geriatric trauma and hospitalization. In particular, elderly patients often experience subsequent complications, bed rest and functional decline after undergoing a surgery during hospitalization. Postoperative functional decline often results in disability that in turn leads to subsequent long-term care and poor quality of life. In this case report, because of functional decline following discharge from the hospital after trauma and abdominal surgery, an 83-year-old man was sent to a nursing home where he experienced malnutrition and depression in his bed-ridden status. With comprehensive geriatric assessment and further interventions including sufficient nutrition, emotional support and rehabilitation with adequate assistant devices, the geriatric team was able to improve his daily activity, nutrition, and mood status to the extent that he eventually returned home and enjoyed a better quality of life.