The intelligent control system of biology fermentation based on ARM9 and fuzzy neural network（FNN） is introduced.ARM9 has the advantage of good real time and convenience

which can help control the complex system.In allusion to time-varying

nonlinearity

time-lag and random of the biology formation control process

the fuzzy neural network（FNN） control technology based on genetic algorithm（GA）is proposed.This control technology combines the advantages of the genetic algorithm

fuzzy theory and neural networks.To a certain extent

it has resolved the deficiency of the traditional control that hardly finds the mathematical modal and makes effective control.It’s proved that this system has good control performance（high accuracy and good robust） and can achieve good efficiency of control to the biology formation.