Entrusted by BOE, MOEA, ITRI has built an “Subtropical Performance-Testbed for Innovative eNergy Research in Buildings Laboratory, SPIN Lab” at Shalun Smart Green Energy City in Tainan. Its whole-testbed-rotatable characteristic provides different orientation testing possibility. Users can implement different building materials, construction technologies, equipment, systems, and control strategies into this testbed according to their testing needs, test and validate the energy efficiency, thermal and visual comfort performance, and IAQ. In the long run, this facility will play a significant role for building technology research, product’s performance validation, simulation tool validation, and building code update.