Abstract: MEP design (Mechanical, Electrical, Plumping) is an important aspect of building design. Collision problems of pipeline usually occur in two-dimensional CAD design, because currently three disciplines are independent and pipeline design plays an important role in MEP design. At the meantime, inconvenience of communication and un-unification of data standardization bring more difficulties into the collaboration among MEP designers. In order to solve this problem, MEP designers have to coordinate the pipeline synthesis problem, which is prone to less efficiency, more mistakes and delay of the project. In other words, it restricts the development of MEP design. More and more emphasis has been attached to BIM and building collaborative design technologies. This paper summarizes the state studies of MEP design based on BIM, and then presents the characteristics and designing procedure with object oriented AutoCAD MEP software. In particular, the function of collision detection during MEP design is discussed and the suggestion on the application of BIM based MEP design to municipal pipeline network is proposed.