Electrodialysis experimental equipment is developed by our company for small-scale qualitative experiments, used for preliminary qualitative analysis in project phases. It determines the basic parameters and preliminary effects of the electrodialysis process in material separation and purification, especially in desalination or salt concentration, providing technical support for later industrial system design. The membrane stack of this equipment is removable, allowing the selection of different types of electrodialysis membranes based on varying water quality and material conditions. By combining different membrane products, it can be assembled into various configurations such as ordinary homogeneous membranes, two-compartment bipolar membranes, and three-compartment bipolar membranes, enabling multi-functional use. Additionally, the upgraded MY-EDX4 small-scale testing machine is equipped with an automatic control system featuring a touch screen, which has the capability to fully export experimental data, providing precise data support for rapid process development in the next step, and is easy to operate and maintain.