This intelligent UV water sterilizer disinfects and reduces the risk of bacterial containmination by killing 99.9% of germs (e.g. E.coli). This UVC LED disinfection module features small size, safe, energy saving with longer lifespan comparing to conventional mercury lamp disinfection systems. An embedded sensor will activate the UVC LEDs when water flow is detected. This sterilizer can disinfect 2 liters of water per minute. It also monitors UV light intensity to alarm the change UV LEDs. The module can be integrated with water filtering system and is capable of being a smart home appliance, making it convenient for managing the safety of direct drinking water.