The invention provides a medical water treatment technology and a medical water treatment system, wherein the medical water treatment technology comprises a first stage water treatment process, a second stage water treatment process and a third stage water treatment process; after medical water is treated by the first stage water treatment process, obtained first stage effluent is taken as inlet water of the second stage water treatment process; after the first stage effluent is treated by the second stage water treatment process, obtained second stage effluent is taken as inlet water of the third stage water treatment process. The medical water treatment system comprises a first stage water treatment device, an intermediate water tank, a second stage water treatment device, a second stage water tank, a third stage water treatment device and a purified water tank which are sequentially communicated with one another. The medical water treatment technology is capable of sorting the water of different departments according to the water consumption characteristics of the different departments in a hospital and adopts a water supply mode of concentrated water production and water supply by different qualities, thus meeting the water consumption demands of all the departments, greatly lowering the water production cost, and reducing the management and operation costs of the medical water.