The invention provides a formation acid recovery facility. The facility comprises an acid absorbing device for absorbing to-be-filtered formation acid, a primary filtering device for performing preliminary filtration on the formation acid absorbed by the acid absorbing device, and a secondary filtering device for performing secondary filtration on the formation acid subjected to preliminary filtration and outputting the formation acid subjected to secondary filtration. A formation acid recovery method comprises the steps of absorbing the to-be-filtered formation acid, performing preliminary filtration on the absorbed formation acid, and performing secondary filtration on the formation acid subjected to preliminary filtration. The formation acid recovery and facility and the method for recycling the formation acid with the facility provided by the invention can be used for collecting residual acid after polar plate formation, a setting pond can be used for performing preliminary filtration on the residual acid, then a precision filter can be used for performing secondary filtration on the residual acid to effectively filter impurities in the residual formation acid, and then the filtered formation acid is output to an acid making chamber to be recycled. Therefore, the environment pollution caused by the residual acid in the polar plate formation process is avoided, and the production cost is reduced.