Small and medium enterprises develop quickly in Taiwan. The managers of these enterprises are often married couples. Couples working in such businesses are known as copreneurs. This study aims to examine copreneurs’ dominant mode of self-identity and involvement, and the social network influences the business intelligence of the wife in such a couple. The entrepreneur’s wife is like a silent motivator for the husband on enterprise performance. The researcher interviewed 7 participants face-to-face and prepared open-ended questions to ask to understand the effects of entrepreneur’s wife’s self-identity, involvement, social network, and further to discover how they practice their abilities and business intelligence. The Case Study approach was used to conduct the data analysis. The findings of the research identified connect of business duties with social activities and develop the abilities and skills of entrepreneur’s wife’s business intelligence, her abilities, and her thoughts on enterprise performance.