The utility model discloses a fermentation linkage device which comprises a fermentation primary tank, a fermentation secondary tank, a monitoring system and an analysis system, wherein the fermentation primary tank is connected with the fermentation secondary tank through a pipeline; the fermentation primary tank and the fermentation secondary tank are connected with the monitoring system respectively; and the analysis system performs concentration analysis on the data measured by the monitoring system. By optimizing the fermentation process by the fermentation linkage device disclosed by the utility model, the development period is shortened, and the optimization cost is lowered.