Research conclusions: ( 1) The design should be incorporated into the core part of project management． The group or project manage department should hire sufficient experts for direct management，while the design institute should open the mind and coordinate with the construction units to realize the integration of design and construction． ( 2) The design guidelines should be reflected from in accordance with the contract and benefits． The design standards，materials，technologies，design proposals of each discipline etc． ，should be evaluated s to maximize the benefits of the contractor．( 3) The general contractor should manage the design resources，arouse the enthusiasm of designers and mobilize them to play the role of external surveillance，so that they can cooperate closely on the design in accordance with the goal of contractor．