We develop and test model of subsidiary's business relationship complexity and relationship network in multinational enterprise (MNE) based on the way by managing in its foreign subsidiaries. Extant literatures argue that, to facilitate the external cooperation relationship, subsidiaries need to possess business relationship complexity, and moderate through subsidiary autonomy and headquarters' resource allocation. Using questionnaire survey data from foreign subsidiaries in Taiwan, by separating relationship into supply and customer, we find that different aspects of subsidiary network practices exhibit different direct and moderate effects. Subsidiary business relationship complexity has an inverted U-shape effect to the supply relationship network, while autonomy have positive effect to the relationship network. Besides, in the moderating effect of headquarters' resource allocation, the more resources the headquarters allocates, the effect of weakening the relationship will be. Overall, we conclude the paper by highlighting critical issues for subsidiary management in the MNC landscape by identifying the rich theoretical and practice contribution.