The system usually consists of a box, a set of pump, a set of electrical mixer, can also be designed as structures of one box, two sets of pump; two boxes, two sets of pump; two boxes, multi sets of pump; multi boxes, multi sets of pump. It boasts high security and stable performance, and is convenient for transportation, installation and maintenance. Electrical control box or centralized control (remote/auto control) can be chosen. It is used for making liquid-liquid, solid-liquid, gas-liquid solution and for quantitative transferring of flocculant, coagulant aid, antifoamer and disinfectant in waste water treatment.