In order to better detect and control the operation effect of auxiliary equipment in substation, a feedback control model based on mobile Internet technology is proposed. The feedback parameters can be set by cascade algorithm, and the control process can be optimized according to the feedback parameters. Finally, the feedback control model of auxiliary facilities can be designed. Finally, the design of feedback control model based on mobile Internet technology is verified by experiments. Finally, the experiment proves that the feedback control model based on mobile Internet technology assistant facilities is more practical than the traditional model and fully meets the research requirements.