As a part of lifeline system, the LNG tanks seismic design is very important because of the increasing danger caused by the rapid economic development. However, the LNG tanks design codes are absent in China. The application of the double-layer spherical tank should be promoted, because of its advantages including better mechanical behavior, less maintenance cost etc. The state of the art about the design aspect is reviewed, especially the low temperature material properties, the liquid-structure interaction analysis techniques, the isolation and damping of tanks. The potential aspects for the future design are also discussed.