The supervision work of most projects in China is limited in the construction phase and in some cases merely restricted in quality control during construction,which lags far behind the supervision target of whole phases and all respects.During projects construction,good supervision work in the designing phase is prerequisite for good supervision work in the construction phase and is the key to ensure good quality of projects and employer's long-term benefits.It is important to strengthen the supervision work in designing phase under proper guide and standardized management,so that putting forward China's supervision work to a new stage.