The present disclosure provides a bacterium-contained hydrogel including: hydrogel, bacteria, and metabolites. The hydrogel includes a plurality of polymer chains crosslinked with each other, and each of the polymer chains include at least one polyethylene glycol chain. The bacteria are located in the hydrogel, and the bacteria use the polymer chains as a carbon source for fermentation. The metabolites are produced from the fermentation of the bacteria using the polymer chains as a carbon source. The metabolites distribute in the hydrogel. The present disclosure also provides a method for making bacterium-contained hydrogel.
