The objective of this study is to investigate whether the M&A in the seed firm is positive or negative. Based on some indices including market structure and price level, findings are that the impacts of the M&A are not so high as we previously expected. In the vegetable seed marketing sector, some positive results have been found, improving the transparency of the seed transaction which seemed difficult to solve. The volume of total seed production, however, has dropped since 1997, the year of the M&A, but the fluctuation varies by commodity. Therefore, the impact of M&A in the vegetable seed industry so far seems positive according to some index. But the results drawn from the results must be approached with care, because the time and method of the survey contain some restriction, and the data used need objectivity and stability.