Taiwan High Speed Rail (THSR) is an important transportation project in recent years. Effective energy-saving planning not only reduces the operating cost but also complies with government’s policies. Meanwhile, the enterprising impression of THSR cooperation can be enhanced. This thesis focuses on the energy-saving methods applied to Chia-Yi station of THSR. Along with the green building design concept, the energy-saving strategies and benefits for lighting and air-conditions since year 2005 are analyzed.