This article examines the business management in Taipei for Interior Design company. This research selects to interview one interior design firms selected from Taipei. In the process of KSF evolution, managers find certain behaviors, opinions and values to be adaptive and adjusted. Study was conducted through depth-interview with experts. This study yielded the following conclusions: the findings indicated KSF are Product / Services, Marketing, and Financial Affairs. Environmental effect: includes significant differences in categories factors among Macroeconomic, Law and Policy, Market Opportunity and Demand, Industry Foresight Factors.