After China enters WTO, its antique retailing and wholesaling sector is faced with tough competition as the global retailers rush to enter the field. Shanghai is one of the highest density cities of convenience stores. In addition, foreign companies has limited by laws in China, how to compete with the other state-owned enterprises which owned many advanced advantages will become a big issue. Base on the China market situation, the research is focus on key success factors of oversea chain convenience stores. What the methodology is used is ¡¨Case Study¡¨. There are three data sources-deep interview, including the convenient store company to be the object discussed here and the supporting business unit in Convenience Store Division, Ting Hsin International Group. With its own marketing, alliance program, store products, backup office support systems, goods delivery and creativity as well. Compile the organized information and analysis then get conclusion. The concrete research results s are as follows¡GThe Key Success Factor of oversea chain convenience stores can be divided into four dimensions which are expanding stores and surroundings planning ability, products innovation and diversity, marketing planning. The last but not least is quality of store operation and service. To build up an integrated supply chain system is also do help when entering into new market. Though the scale of convenience stores is the foundation of profit, it can¡¦t guarantee the sustainable profit. Base on the store unit profitable, enterprise should find the virtual growth pattern of turnover to make the sustainable profitability.