On-line optimizing management system is one of the advanced management systems for improving operation efficiency of the fossil-fired power plants.Introduced in this paper is a comparison of different developments at home and abroad

from which two points have been found:one is that the real time control values for energy consumption（differential energy cost）reduction provided to plant operator are the dynamic values got from simulation in abroad

while those at home are non-real time values obtained from testing for reference;the other one is that it is quite necessary to study on the economic performance of soot blowers for improving and optimizing the on-line management system.