This paper summarizes the gain and loss of implementing BIM technology application in practice of the internal medicine building project of Shenzhen People's Hospital. Referring to the design method of rail transit industry, this paper proposes the concept of gauge design, and adopts the method of BIM aided design in the design method and steps for medical logistics track car system. Also, the paper puts forward the development of model and the design method under different LOD levels in the process of BIM aided design.