Currently

the maintenance technology of gas turbine is monopolized by foreign companies

and the life cycle maintenance cost of power generation equipments is very expensive(17.8times of the purchase cost).To reduce the maintenance cost for gas turbine

this paper designed a novel gas turbine maintenance decision system and introduced a calculation method for predicting the life cycle of relevant parts of the gas turbine.Moreover

the maintenance decision-making key parameters were proposed.On this basis

the heavy-duty gas turbine maintenance decision-making model was established.Then

the structure and implementation framework of background calculation server and WEB server of the maintenance decisionmaking system was designed.Finally

based on B/S structure model

the preventative maintenance decision system for gas turbine was developed.The field application verified this system can provide more efficient decision for the gas turbine's maintenance decision

and the system operated stably.