The business activities are influenced by the development of telecommunication network. The objective of this paper is to clear how much do the development influence, especially how much do the development of TV conference to the 'face-to-face' communication. In conclusion, (1) Only a business firm affiliated with same group, TV conference will be more important than face-to-face communication; (2) As, many company feel that the face-to-face communication is important in the communication with the company belonged to the other group, the office will separate into front-office and back-office.
