Abstract: With the deepening of electric system reform, keeping equipment operating efficiently, enhancing labor productivity, increasing economic benefits have turned to be target of power plant development. The automation level of the Balance of Plant (BOP) has a direct influence on plant's economic benefits, as BOP's process automation plays a crucial role in the whole plant. Basing on current BOP centralized control system, whose net structure and control mode has been elaborated studied and optimized, a reliable control mode with national conditions is proposed in this paper.