How to ev aluate the fuel gas operation (FGO) of various working groups (WGs) and working shifts (WSs) in reheati ng furnace is still ambiguous problem. In this paper, a nov elty times eries FGO evaluation model was propos ed. The strategy mainly included: Fi rstly, the fuel gas per ton steel (FGTS) was calculated i n certain time interval; Secondly, the FGT S times eries data set was formulated in s tatistical period; Thirdly, the FGTS time-series data set was divided according to worki ng schedule; Lastly, the FGO evaluation model was established. Case study showed that: i) The fuel gas operation evaluation results of various WGs in different WSs were accorded wi th normal distribution; ii) For various WGs, A WG performed best, followed by C WG and D WG. The performance of B WG was the worst due to its violent fluc tuation of fuel gas operation evaluation res ults in three WSs ; iii) For different WSs, the day WS and swi ng WS performed well, whereas the performanc e of night WS was unsatisfactory. Discussion results showed that the improv ement of working skills, working responsibility and working passion, which were effec tive measure to ac hieve energy saving in terms of operation, should be enhanced through skills traini ng and the reward and punishment system. Generally, this novelty time-series FGO evaluation method could also be applied to other industrial equipment.