The study aims to explore sustainable and renewable energy application via a case study from green buildings to green sustainability. Therefore, first of all, the study reviews definitions of sustainable energy, renewable energy technologies, energy efficiency, smart-grid technology, green energy and green power, sustainable energy research includes solar, space-based solar power, wind. Secondly, the study discusses a case study from green buildings to green sustainability in TSMC, includes TSMC's response to climate change, GHG emission reduction, initiating TSMC carbon management, renewable energy application.