A capacitive deionization (CDI) system is combined with microfluidics technique to construct a hi_ghly efficient desalination cell. Both active materials for positive and negative electrodes exhibit faradaic reactions with the "memory effect" behavior and permit the unique application of a multi-function system with both desalination and concentration abilities. The salt removal capacity (SRC) of this cell highly depends on the operation time which can reaches over 50 mg g-1 min-1 under a 60-min discharging process. The salt removal rate (SRR) profile shows the highest value of ca. 12 mg g-1 min-1 in the beginning of the salt removal step and continuously decreases to near O with prolonging the desalination time. The unique salt-removal/salt-concentration test demonstrates the multi-function application on the basis of memory effect, and can transfer 148.8 mg g-1 of salt from one solution to another in a 100 minutes test. According to the salt removal performance of the microfluidics CDI cell, it has the potential for being a suitable water desalination technique in brackish water treatment. Furthermore, the concentration tolerance can even reach sea water following this pattern by choosing appropriate active materials. To sum up, this technique may be a very powerful tool in the field of "clean water and sanitation", which is one of the 17 sustainable development goals (SDGs) that has been raised by the united nation.