Abstract: CAD software has been improved greatly by the developing of operational speed, graphics capability, and graphics theory in computers.CAD technology is developing from simply drafting to assistant design tools. BIM is the base of the next generation CAD software which the important features is networking, integration, intelligent and standardization.Using Building information model, PKPM series software realize the idea of digital information, data modeling and making general of building model through connecting each segment in construction projects, and achieve to fully utilizing the model data in the life cycle of building.PKPM series software cover many fields including planning, architecture, structure, facility, budgeting, construction and business management, take full advantage of data among each specialty in designing process, reduce the construction cost and improve efficiency.