The technology of three-dimensional visualization is very useful in that it can provide three-dimensional image which contains the information of structures and stratigraphic characteristics. The authors attempt to achieve the three-dimensional visualization of seismic horizon based on Java-X3D. Compared with the conventional methods, this technology has advantages of stepping platforms, real-time character, distribution feature, and the power of interaction. It can satisfy the demand of three-dimensional visualization of highly complicated calculation in the network environment. In this paper, the authors employ the bend surface using the coordinate of the horizon based on X3D, and apply the function of viewpoint switch.