“NeuroGym” is an interactive cognitive training, monitoring, and gaming platform. The research-based cognitive training is elderly-friendly and based on local cultures, e.g. Mahjong, calligraphy and daily life scenarios, aiming at prevention of dementia, active and continuous engagement, and personalised training for the elderly. It allows caretakers, elderly centers and healthcare professionals to better monitor and assess their conditions and provide timely treatment. Features: 1. Personal accounts suitable for individualised and group training and outreach service; the platform will adjust the difficulty level automatically to suit the needs of different users 2. The report management system allows organisations and caregivers to monitor and assess the cognitive health condition of users, and arrange timely support 3. Distanced remote-control training, online multiplayer and pre-set schedules are suitable for home training under Covid-19 even without internet.