As a export-oriented Korean company, entering into an advanced and big market is a very strategic issue. In this study,We analyzed the new entrants, korean home-appliances companies, how they defeated the leading companies based on the Christensen's disruptive innovation theory. Korean washing machine gained 25% of market share in total washer market,and closed to 50% of market share in premium drum washer segment in US, competing with GE, Whirlpool who are No.1,2 company, in 6 years. We present some insights for successful launching in US or other advanced market. Which including, industry information, Market share, distribution channel, competition status and many empirical data and information. Until many papers, studied about the technological acquisition strategy and related theory rather than marketing approach view. But in this study how differentiate, and how leading the market in view of new-market disruptive innovation products and winning marketing factors.