The process and trait of reliability-centered maintenance management,the relation between reliability blue print and maintenance scheme,the essential and realizing way of reliability blue print and its effect on the maintenance management were introduced.

To bring forward the decision method of the aviation maintenance project based TOPSIS aiming at Aviation Corporation is very difficult to chose the economic project.

Aiming at the problem that maintenance decision is made just according to reliability,maintenance costs or operation condition in power stations,and the whole maintenance optimization can not be realized,a frame of risk-based maintenance decision is suggested.

This paper briefly introduced the basic model and method of the maintenance optimization and management technology that Thermal Power Research Institute developed and applied.

Maintenance optimization depends on correct and timely supply of information.

And the optimal maintenance model of the aircraft structure based on imperfect inspection is developed to minimize the maintenance cost rate.

An optimal maintenance model is constructed to calculate the variant check intervals under the policy, which aims to minimize maintenance cost rate, and is subject to system availability.