Abstract
The optical components industry of Taiwan had grown up in recent years, the high gross of margin rate is more than other high tech firms. One of the optical components firms is Largan, which is the biggest firm of producing plastic lens in the whole world. The study aims at Largan’s development history and Largan’s key successful factors. The study adapts single case study method to survey Largan’s development processes and manager’s management. We get the conculusion that Largan has self-sufficiency property in technology, human training, machinery equipment ，and product producing. According to resource-based view, Largan can get sustainable competitive advantage is due to he establish strategic resources continuously.