This paperestablishesaBIM model of substation, which based on the secondary development of Revit to realize the modeling of rebar and automatic reading information in the BIM model. Thus the engineering quantity ofrebar, concrete, doors, windows and walls can be calculated automatically.The developedprogram also provides the functions to apply the quota based on the family and the family symbol, and thusto get the bill of quantities directly from the BIM model of substation.