The present invention relates to a fully automatic industrial circulation cooling water purification and scale treatment system, which comprises a water inlet mother pipe, a water outlet mother pipe, a plurality of scale suction and filtration modules, an electronic control system, a high pressure gas system and a scale discharging system, wherein the scale suction and filtration module comprises a processor, a scale suction and filtration electrode, a sterilization and algae killing electrode, a gas distribution pipe, an upper combined three-way valve, a lower combined three-way valve and a valve controller, and the scale discharging system comprises a scale discharging mother pipe, a scale discharging tank and a water discharging pump. According to the present invention, the scale forming substances and the impurities in the circulation cooling water treated by the fully automatic industrial circulation cooling water purification and scale treatment system are substantially reduced, and the easy-scaling ions being not adsorbed form hydrated ions under the action of the special electrodes so as to reduce the re-scaling chance; the fully automatic industrial circulation cooling water purification and scale treatment system can be used in the closed circulation system; with the fully automatic industrial circulation cooling water purification and scale treatment system, it can be ensured that the cooling water does not scale in the closed circulation system, the formed scale can be slowly cleared, and the protection film can be formed on the heat exchange wall surface after the formed scale is formed; and the fully automatic industrial circulation cooling water purification and scale treatment system further has high-precision filtration function, wherein the circulation cooling water can be significantly clear and the scaling condition is significantly relieved or released after the fully automatic industrial circulation cooling water purification and scale treatment system is used for about one month.