From the work content: divided into the whole process of supervision and supervision; There are quality, time limit for a project, multi-target supervision cost and supervision of single objective. For a project, it is better to make the whole process, multi-target supervision, because it can obtain a bigger benefit. Such as engineering design scheme of a great influence on the effect of investment, if only a construction supervision is not a design supervision, supervision of the effect is very limited. Scale and time limit for a project, such as the construction of large and medium-sized construction projects has much effect on the economic benefits, if the supervision quality control not only investment and time limit for a project, is picked out to throw away. So the whole process of supervision, especially large and medium-sized construction projects and key projects of the whole process of supervision deserves more attention. But commissioned a specific concerning the content of supervision can be flexible disposal according to particular case, the owner may appoint a unit supervision, also can entrust a few units than the dry at the same time.