EDI (Electrodeionization), also known as continuous ion removal technology, scientifically integrates electrodialysis and ion exchange technologies. It utilizes cation and anion membranes to selectively permeate cations and anions, and ion exchange resins to exchange ions in water, achieving directional migration of ions in the electric field. This process results in deep purification and desalination of water. Furthermore, the hydrogen and hydroxide ions produced by water electrolysis continuously regenerate the filled resins, enabling the continuous production of high-purity water without the need for acid or alkali chemicals. It boasts compact structure, easy operation, and is widely applicable in power, electronics, medicine, chemicals, food, and laboratory industries. It represents a green approach to water treatment technology, with stable water quality output.