Objective To conduct a scoping review of studies on the application of digital technology in mental health interventions for older adults, in order to provide references for conducting nursing interventions to promote mental health of older adults.Methods A systematic search was conducted in PubMed, Web of Science, Science Direct, Embase, Cochrane Library, PsycINFO, CNKI, VIP Database, Wanfang Data Knowledge Service Platform, and Chinese Medical Journal Network, retrieval time was from the inception of these databases to August 1, 2024, the included literature was summarized and analyzed.Results A total of 16 articles were included.The digital technologies encompassed the Internet, robots, information and communication technology, personal voice assistants, and virtual reality technology.In terms of intervention content, it covered various aspects such as psychological knowledge courses, cognitive-behavioral interventions, exercise and physical activity, memory training, daily life reminders, emotional interventions, communication interactions, and social engagements.The duration of interventions ranged from 4 weeks to 12 months.The research results indicated that digital technology-based mental health intervention models, such as virtual reality cognitive training, Internet-based cognitive-behavioral therapy, and online social platforms, could effectively improve cognitive function, alleviate negative emotions, and enhance social support among older adults.Conclusion Digital technology can effectively improve cognitive function, alleviate depression and loneliness among older adults, while the long-term effects require further verification.Future research should optimize the aging-friendly design of technology, establish standardized service processes, and conduct long-term follow-up to enhance the stability of intervention effects.