Abstract: This paper proposes a multi-parameter collaborative monitoring system and monitoring method for water vapor degassing hydrogen conductivity, which utilizes electrical regeneration technology to measure conductivity and degassing hydrogen conductivity without replacing the regenerated resin, and the measured values can respond quickly; For the pure water system added with ammonia in the power station, the pH value of the water sample is collaboratively calculated based on the measured values of electrical conductivity and hydrogen conductivity, greatly improving the accuracy of pH measurement; At the same time, the double water membrane degassing technology is used to remove carbon dioxide from water, so that the measured value of the degassed hydrogen conductivity can be compared with the theoretical hydrogen conductivity value of the standard solution, and the measurement accuracy of the degassed hydrogen conductivity can be effectively evaluated. This method can be used to monitor conductivity, hydrogen conductivity, pH value, and degassed hydrogen conductivity in collaboration. It has been applied to on-site monitoring of typical gas combined cycle units, direct air cooling units, and heat supply units. Through data comparison and analysis, it has been proven that the method has high measurement accuracy, can assist in solving various technical problems that occur on site, and has strong promotion and application value.