The invention discloses a system and a method for performing salt separation and concentration solidification treatment on high-salt and easy-to-scale waste water. The system comprises a waste water buffer pool, a salt separation replacement device, a first reverse osmosis device, a recycling water pool, a univalent salt working liquid circulating device, a first nanofiltration device, a second nanofiltration device, a first electroosmosis device and a second electroosmosis device. According to the system and the method, zero discharge treatment of the high-salt and easy-to-scale waste water can be realized, and the investment cost and the operating cost are low.