Molten metal bath composition analysis system, molten metal bath composition analysis method, hot-dip galvanizing bath management method, and hot-dip galvanized steel sheet manufacturing method

A molten metal bath composition analysis system comprising:

• a laser oscillator that oscillates a laser beam;
• a cylindrical probe that includes an opening end immersed in a molten metal bath, supplies an inert gas toward the opening end, and guides the laser beam to the opening end to irradiate a molten metal with the laser beam;
• and
• a detector that detects and spectroscopically analyzes plasma emission of the molten metal caused by the irradiation with the laser beam, wherein
• at least one of a position of the opening end of the cylindrical probe in the molten metal bath and an angle of the cylindrical probe with respect to a vertical direction can be controlled,
• the molten metal bath composition analysis system comprises a pressure sensor that measures a pressure of the inert gas, and
• at least one of the position of the opening end of the cylindrical probe and the angle of the cylindrical probe with respect to the vertical direction is controlled on a basis of the pressure of the inert gas obtained by the pressure sensor.