The traditional fortress structures have the various construction types in the shapes, slopes and infilled materials. Also, we should consider the various applied load conditions as design variables, and then check the dicontinuum behavior characteristics for the reasonable structural modelling and analysis of fortress structure. Therefore, this study selects the representative fortress structure, and then performs the structural modelling considering the various construction shapes and slope variations. Especially, this study evaluates the structural behaviors according to the construction types of fortress structures by comparing the stress and displacements through the discrete element analysis.