Abstract: Centrality measures and topology robustness analysis were exploited to research SAP system migration in an enterprise. A networkhardware upgrade plan was presented based on betweenness centrality and a metric to measure local topological robustness was devised. Via simulation and implementation， effectiveness of the proposed methods was confirmed. Result shows that application of complex network on realworld system analysis and design can improve the robustness and respond time of the SAP system.

Key words: complex network, centrality measure, robustness, system migration, SAP(systems， application and products)