Following the development of new technologies, more and more users can access online mobile content now. Reading news is the most used service in Taiwan. Because of the potential profits of valued-added services in telecommunications, many traditional media are joining this market by providing news content. The author tries to find out the motivations, reasons of partner selection, and the measures of performance of the strategic alliances between telecommunication operators and news content providers by in-depth interviewing managers of telecommunication and media in news mobile content service strategic alliance. This research analyzes the different strategies taken by both parties and evaluates the outcome of strategic alliance. This research indicates that the different managerial culture between alliances would influence the sustainability. Besides, Strategic alliances have the risk of profit-sharing and stray from seeking short-term profit.