Objective To conduct a scoping review on the application of wearable technology in elderly patients with dementia, to summarize the elements and application status of wearable technology, so as to provide a reference for improving the efficiency and quality of care for elderly patients with dementia. Methods The JBI evidence-based healthcare centre′s scoping review guidance was utilized as the methodological framework, then relevant application studies of wearable technologies in the care of elderly dementia patients in PubMed, Embase, CINAHL, Cochrane Library, Web of Science, CNKI, Chinese biomedical literature database, Wanfang database, and VIP database were searched and reviewed. The retrieval period was from the database inception to December 12,2024. The included articles were screened, summarized, and analyzed. Results A total of 15 articles were included, consisting of 2 randomized controlled trials, 3 cross-sectional studies, 2 mixed studies, 7 quasi-experimental studies, and 1 qualitative study. The application types of wearable technology included limb wearable devices, smart watches, wearable three-axis accelerometers, SenseCam wearable cameras, wearable sensors, and active hearing aids. The outcome measures involved six aspects:mobility, cognitive function, mental state, physiological parameters, feasibility and use experience. Conclusion Wearable technology show good feasibility and effectiveness in elderly patients with dementia, and no relevant adverse events are reported. However, in the future, it is still necessary to strengthen the optimization of technology design, establish a multidisciplinary cooperation mechanism, and promote the application of wearable technology in the health management of elderly patients with dementia.