With the development of the new technology, the architectural design has reached an unprecedented level in building industry.The advanced technologyallows new design approach and concept to be realized, and also providesgreat vision for betterarchitecture aesthetic, technology research and building construction method.This paper explores the 3D design methodologyonthe cooperation platformthrough a casestudy of theice world project in Changsha.Byestablishing the project database of building components, the virtual expression of complex building shapecan be realized, which is able to apply the idea of prefabricated architectureto complex shaped buildingssuccessfully.