A chlorine dioxide water solution production apparatus comprises a production device and a mixing and measuring device. The production device includes an electrolysis unit for electrolyzing an electrolyte solution to produce chlorine dioxide gas. The mixing and measuring device is connectively assembled to the electrolysis unit and includes a transportation mixing unit capable of mixing the chlorine dioxide gas generated by the electrolysis unit with water into a chlorine dioxide water solution, a measuring unit disposed in the transportation mixing unit for measuring the oxidation-reduction potential of the chlorine dioxide water solution, and a control unit connected to the measuring unit and the transportation mixing unit by signals. The present invention measures the oxidation-reduction potential of the chlorine dioxide water solution by the measuring unit to facilitate the control unit to automatically control the mixture of the mixing unit for production, thereby providing the advantages of convenient quality control and mass production.一種二氧化氯水溶液生產設備,包含一個生產裝置,以及一個混合測量裝置。該生產裝置包括一個用來電解一電解液以產生二氧化氯氣體的電解單元。該混合測量裝置連通組接該電解單元,並包括一個能將該電解單元產生的該二氧化氯氣體及水混合成為該二氧化氯水溶液的輸混單元、一個設置在該輸混單元並能量測該二氧化氯水溶液的氧化還原電位的測量單元,以及一個訊號連接該測量單元及該輸混單元的控制單元。本發明以該測量單元量測該二氧化氯水溶液之氧化還原電位,能利於該控制單元自動化地控制輸混單元混合生產,具有便於品管及量產之優勢。