The invention discloses a new type of water treatment water quality comprehensive monitoring device, which includes an inlet electromagnetic valve and a bypass inlet pipe. The inlet electromagnetic valve is installed at the top of the bypass inlet pipe and the top of the inlet electromagnetic valve is connected to the air conditioner circulating water pipe. By integrating the various detection instruments, the water quality parameters can be monitored and the cleaning of the instruments can be completed in time, effectively isolated from the circulating water, reducing the surface scaling of the various instruments, eliminating the scaling effect of the instruments The error of the water quality data is too large to affect the normal operation of the air conditioner unit, and the water treatment effect and energy consumption are improved, and the distortion of the data after the scaling of the instruments and the effect of the water treatment effect and the economic operation of the air conditioner unit are reduced. The water quality monitoring instruments are concentrated together and modularized, which is easy to be controlled intelligently and improve the reliability. The maintenance cost is low, and the bypass form can be used to change parts or repair without stopping the machine.