“…However, which devoid of wholeness, it is only a partnering comparison. The set-point topology is characterized by neighbor goodness, namely the wholeness, but, devoid of numerical measure [3][4][5].Therefore, by cooperating the distance space with point-set topology, the grey relational space is established, which can be crystallize as Distance space+ set-point topology=GR space Differing from the traditional mathematical analysis, GRA provides a simple scheme to analyze the series relationships or the system behavior, even if the give information is few [6][7].…”