The goal of this observational study is to establish a digital diagnosis and treatment system for sarcopenia, integrating research outcomes into a unified approach encompassing a digital vaccine (early warning screening model), digital drug (intervention model associated with pathogenesis), and digital rehabilitation (preventive system combining early warning and treatment). This aims to create a digital visual tertiary prevention network for sarcopenia. Research aims: Evaluate the effectiveness of the digital vaccine through a cross-sectional epidemiological survey. Establish a specialized cohort for sarcopenia through a longitudinal investigation, implementing the digital drug and digital rehabilitation interventions. Participants will: Engage in screening and assessment based on inclusion and exclusion criteria. Be monitored longitudinally, with tailored interventions for those with muscle atrophy and regular follow-ups for at-risk individuals. Key outcomes will focus on sarcopenia indicators, serum biomarkers, and clinical endpoints such as fracture rates, weakness classification, and quality of life.