Nowadays the application area of numerical simulation is growing rapidly. Many researchers challenge complicated and large-scale simulation, for example seismic response simulation. The utilization of ADVENTURE system on the Earth Simulator enables such a time dependent simulation of a large-scale model. As this technology advances, post processing requires further advancement. We should think about how to deal with a huge amount of data. In particular, visualization demands interaction with users' needs. One of the solutions of those demands is to develop a Walkthrough Visualization System in a precise simulation world. In this research, we propose a Walkthrough System for structural simulations of a large-scale and complex model.