The ground structure's intelligent and automatical creating is researched. The ground structures of truss structures are intelligently and automatically created by using collateral ANFIS (Adaptive-Network-Based Fuzzy Inference Systems). The essentials of this method is to form a mapping between configurations of the trusses existed and those to be found. The ground structure is inferred by the mechanism contained in sample trusses. To produce appropriate data format of ANFIS, the topology configuration of trusses is described as a series of decimal fraction. The simulation shows the efficiency of this system.