Compared to traditional timebased and conditionbased inspection methods， Riskbased Inspection (RBI), recently， is a new integrity management inspection technique which has been rapidly developed and applied to large offshore facilities. RBI is an advanced method for developing an optimum inspection plan and strategy which has coupled with techniques of database management， material damage and deterioration mechanism analysis， structural strength FEA， fracture mechanics for crack assessment， risk analysis and ranking， digital computer management system， etc. The RBI approach can guarantee that structures or equipment with higher risk could warrant more focused inspection than those with lower risk， which can effectively reduce inspection cost. This article will systematically discuss how to apply RBI technique for integrity management of large offshore facilities， while focusing on the application of RBI to the hull， mooring and riser systems of large deepwater offshore installations. Besides， a detailed case study on how to perform quantitative risk analysis on SN curve based offshore structures fatigue analysis.