The processing flow adopted by a set of Pure Drinking Water Treatment System depends on quality of water source and target purpose of water usage. The selected flow basically includes three parts: pretreatment system, micro processing system and terminal processing system. The Pretreatment system includes multi-media filter, active carbon filter, softener, iron-manganese removal filter, ultra-filter, micro-filter, etc. The micro processing system adopts membrane filtration and ion exchange method. The terminal processing system involves in ozone/UV sterilization, iron exchange etc.