The purpose of this project is to process the strong-motion data of subduction zone earthquakes in Taiwan based on the procedures of NGA program. The processed data, consisting of 6523 records from 51 subduction earthquakes ranging in magnitude from 4.31 to 7.1 in Taiwan, will be integrated with global data establishing the subduction zone earthquake attenuation relationship for BC Hydro’s PSHA project. A web-based database system was developed for data acquiring and analysis. Furthermore, data comparison with inter-event and intra-event residual, were conducted to investigate the difference between Taiwan and other countries.