Increasing attention has been paid to the seismic design of tunnels and underground structures since the OsakaKobe Earthquake. In this paper, the seismic damage of various underground structures are presented and the characteristics of the damage are summarized. The seismic capacity and the key seismic design points of integrated underground structures are analyzed based on the calculation data of a station of Shanghai Metro. Several widelyused seismic design calculation methods are introduced, and the idea of setting the seismic fortification target of underground structures on the basis of their functions and importance is proposed. The seismic countermeasures for underground structures are also discussed. 