To better understand how foreign bank in Taiwan develop successful strategies, this study examines the effects of the key customer management and relationship maintaining on relationship quality. Furthermore, we also explore the effort of relationship maintaining on trust, commitment, satisfy, respectively. This research examines the data of the distributors of foreign bank using linear structural analysis. The findings demonstrate that the impact of key customer management on relationship maintaining is significant positive. This study also finds that relationship maintaining has significant positive impact on relationship quality. Managerial implication and research limitation were also discussed.