AC FB一FGDn etworkc ontorlsy stem basedo nI ndustrialE thernetis in torduced.It c onsistso fP Cs,IP Ca ndP LC.B ecauseo fth en etwork structuer taking IndustrialE thenreta st hec ore,a nd'ra tionalr edundantt echnology,thes ystem ofersp owerfulf uncitons,h ighera ccurate dependability. Practical operation result indicates the system fulfiled designing requirement, realized the automation of flue gas desulphurization, and improved eficiency of de-ulphurization. Keywords I ndu strialE thenret CFB一FGD Flueg asde sulphurizaiton Redundanc