Taiwan electron industry was development, brand of management and original equipment manufacturer is each to have the dissimilarity develop the mode, how organize the arrangement with whole combine, carry on organizational change and design to let to operate maximization, support high to grow up and high the market share is all executives must the depth consider of important subject. This research case A computer company in 2004, which won the world's motherboard market share of companies with the highest. From 2005 to 2009, enterprise merger & acquisitions brand and original equipment manufacturer to divide inheritance of organizational activity, inquire into the whole process in the business activity and fluctuating of the business organization. Also, this research case takes the A computer company-enterprise and government department as an example, in the organizational change, how to expand a business market, and anticipate with the interview, through from interview to northern, central, southern dealer and A computer company representative sales, tidy up the current conditions and problems that closed path operates, inquire into more organization design according to current market condition and organization construction.