The integrated automatic system(ICS) is the brain and nerve system of the FPSO. It will directly affect production safety and management of the FPSO.Taking the design of CFD 112 belonged to Tianjing Bohai filiale of COONC as an example,this paper introduces primary equipments,design and functions of ICS,and gives emphasis to the late-model and advanced design idea in terms of emergency shutdown and fire/gas detecting system.