The invention provides a circuit board electroplate liquid intelligent filter system with a filter element free of being replaced and a purification method thereof. The system comprises an intelligentcontrol panel, an electroplate liquid medicine groove, a filter pump and multiple precise filter modules. A liquid outlet of the electroplate liquid medicine groove is connected with the filter pumpthrough a pipeline, the filter pump is connected with a water inlet valve through a pipeline, the water inlet valve is connected with the precise filter modules through pipelines, a first pipeline, afourth pipeline and a fifth pipeline are connected to the precise filter modules, a third pipeline, the fourth pipeline and the fifth pipeline communicate with the second pipeline, the second pipelineis connected with a liquid inlet of the electroplate liquid medicine groove, the second pipeline is provided with an electric TOC removal device, and the first pipeline communicates with the third pipeline. The high-precision full-automatic running filter, and automatic real-time cleaning are achieved, the filter effect is ensured, the filter element replacing cost is saved, losing waste of electroplate liquid remaining in a filter can be avoided, and the enterprise production cost is reduced.