Rolling mill emulsion system water adding method and rolling mill emulsion system

The invention discloses a rolling mill emulsion system water adding method and a rolling mill emulsion system. The method comprises the steps that a liquid level signal of liquid in an emulsion tank is collected through a liquid level collection element; the liquid level signal is used for representing the liquid level of the liquid; whether the liquid level is lower than a first liquid level threshold value or not is judged according to the liquid level signal; when the liquid level is lower than the first liquid level threshold value, water is added into the emulsion tank; and water is not added when the liquid level is higher than the first liquid level threshold value. According to the method and system provided by the invention, the technical problems that in the prior art, the labor intensity is high, the efficiency is low and the error rate is high due to manual adding of water into the emulsion system are solved. The automatic emulsion water adding method and system with the high efficiency and accura