PROBLEM TO BE SOLVED: To provide a method for recycling cleaning acid containing radioactive materials and a recycling facility.SOLUTION: The method includes: a first process of adding an acid solution into a processing object containing radioactive materials and metal components and making the radioactive materials eluted into the acid solution, performing solid-liquid separation, adsorbing and removing the radioactive materials contained in the eluent separated through the solid-liquid separation by making the eluent pass through the adsorbent so as to generate treated acid solution; and a second process of performing a pH adjustment process of removing the metal components in the treated acid solution after adsorption and removal operation by making this treated acid solution pass through an ion exchange resin or a chelate resin so as to adjust the pH of the recycled acid solution remaining after removal of the metal components and/or a separation process of separating the treated acid solution remaining a
