We propose a strategy for constructing a large-scale network system that is stable independently of network expansion. The strategy is composed of two rules. One is on network nodes: every node has a passivity property that is realized by local feedback control. The other is on a network connection: network nodes are connected each other such that specific network structure is satisfied. We further analysis performance of the entire network system and local node. Finally, we present a numerical example of stable power network system construction in order to illustrate the effectiveness of the proposed strategy.