The merger of companies makes it easily that a company get over the limitation of the growth of their internal size. A company can attain its purpose, the growth of itself, merging of existing company. On December 1986, "The Accounting Standards for Business Combinations" were pronounced in Korea. But, some of contents of the standards contain many problems criticized in accounting. The purpose of paper is to examine all kinds of affairs problems resulting from merger in Korea and to present the solutions for the problems. I have reexamined the method and provision of on 1999, "The Accounting Standards for Business Combinations" were pronounced in Korea and developed to the direction of trying to deal with tax affairs reasonably. Next, related to current tax system regarding merger, I have described, centered on tax laws, basic rules and the provisions of taxation on merger corporation and the provision of taxation on shareholders at the time of merger.