Abstract: Building collaborative design is the key factor of information construction for
survey and engineering design enterprises, and the establishment of CAD standard is the premise
and basis of building collaborative design. Thus, the paper carries out a systemic research on CAD
standards, firstly describes the development and the present situation of domestic CAD standards,
then points out some existing problems and gives out the solutions in detail with a practical case
of the implementation of CAD standards in Shanghai ECUC Group. Finally, the application of
CAD standards in building collaborative design is summarized together with further development
of BIM-based building collaborative design platform.

Key words: building design, collaborative design, CAD, professional standards, layer
standards