Abstract: The problem how to apply the three-dimension scene system which has been highly developed in computer science to the pre-and post -treatments of building structures was discussed．A method of developing a management program of complex three-dimension scenes using the free toolkit “GLScene” was proposed．An object -oriented data structure for the three-dimension model was thus set up．By using this model‚an OpenGL-based rea- l time three-dimension scene system was realized．The system has the functions of three-dimension static display and dynamic roam‚etc．and is characterized by low require-
ment of computer hardware and high modeling speed．

Key words: building structure, three-dimension scene system, program development