The characters of the floor box are changing agility and adapting to the diversification of architectural spaces, such as large-area buildings, exhibition hall, airport, bank, post office, lab building, school, hotel, computer center, and housing decoration, etc, It can bear built-in box for power supply, telephone, computer, TV set, microphone, communication, etc. It can be opened when using and be closed down to achieve smoothness of the floor after using, and it is convenient for use.