Abstract: On condition that the supply schedule of the Digital Contral System（DCS） equipments were delayed for Fangjiashan nuclear power project unit 1, series of strategies were adopted in I＆C commissioning to ensure the project progress, including the confirmation of DCS minimum system, separated supply of software and hardware, utilization of the PRE vision（prerequisite） in cover-opening functional tests of nuclear auxiliary system, adoption of temporary scheme in hydrostatic testing, and implementation of DEN on Site using domestic technology. Risk analysis, feasibility study and plan formulation were conducted for the strategies. The project practice indicated that the adopted strategies in I＆C commissioning were effective, and helpful for the control of project progress.