a laser cleaning device , and a laser cleaning method using the same , for removing an electrolyte solution stuck to an electrolyte tab during a process of injecting the electrolyte solution are disclosed . the laser cleaning device for an electrode tab of a battery includes : a cleaning housing , in which a battery case for receiving an electrode group , an electrolyte solution and an electrode tab exposed to the outside are embedded ; a laser generator which includes a laser source for generating a laser beam and an output controller for controlling output of the laser beam ; a laser transmitter which transmits the laser beam generated by the laser generator ; and a laser emitting unit which is installed inside the cleaning housing , and which irradiates the laser beam transmitted by the laser transmitter onto the electrode tab so as to remove liquid pollutants stuck to the electrode tab . the laser cleaning method comprises steps generally corresponding to the latter functions of the laser cleaning device .