A device for replacing sanding elements of a polishing device includes a first support, a second support, a feeder assembly, a suction assembly, a first pushing assembly, a second pushing assembly, and a clamping assembly. The feeder assembly includes a receiving member configured to receive the sanding elements, and a supporting member positioned below the receiving member. The suction assembly includes a suction member configured to draw a sanding element from the receiving member, and a rotary actuator configured to rotate the suction member. The first pushing assembly is configured to receive the sanding element from the suction member and transport the sanding element to the polishing device. The clamping assembly is configured to attach an unused sanding element to, and detach a used sanding element from, a manipulator of the polishing device, and the second pushing assembly is configured to separate the sanding element from the clamping assembly.