The aging of industrial infrastructure poses significant challenges to safety, reliability, and operational efficiency. To address these challenges, effective structural health monitoring (SHM) techniques and maintenance strategies are essential. This paper provides a comprehensive review of current SHM methods and maintenance approaches tailored for aging industrial infrastructure. It explores advanced sensor technologies, hybrid SHM techniques, digital twins, and augmented reality integration, alongside autonomous maintenance systems. Additionally, it discusses the importance of standardization, sustainability, and environmental considerations in promoting widespread adoption.