To provide a laser welding system that can correct divergence of a laser beam irradiation position with higher precision, and is capable of higher precision laser welding. A remote laser welding system (1) includes: a multi-axis robot (3); a laser head (5) provided to a leading end of an arm (31) of the multi-axis robot (3); a control unit (7) that controls operations of the multi-axis (3) and the laser head (5); and a laser light source (53), in which the laser head (5) includes: two galvano mirrors (51, 52) configured to be rotatable about rotational axes (X1, X2), respectively, and reflect a laser beam; and galvano motors (54) that rotationally drive the galvano mirrors (51, 52), and in which the control unit (7) includes an acceleration sensor (73) that acquires the acceleration of the vibration; and a command correction section (74) that corrects a control command to the galvano motors (54) which rotationally drive the galvano mirrors (51, 52), based on the acceleration of the vibration acquired by the acceleration sensor (73), so as to suppress divergence of the laser beam irradiation position due to vibration.