Taiwan located in the conjunction of Eurasian and Philippine Sea plate. The hazards imposed by earthquakes are unique in many respects in this country. Planning to mitigate earthquake hazard requires a unique engineering approaches. It is this fact that has led to earthquake hazard reduction only by the design and construction of earthquake resistant structures. This course will teach the basic concept of seismic hazard, the influence of earthquake performance of structures and provide the principal and basic concept of earthquake resistant design.