The application discloses an intelligent water valve and a system. The intelligent water valve comprises a water valve switch, a sensor group, a communication module, a power supply module, a control module and a control execution module, wherein the sensor group comprises at least one sensor and is used for acquiring relevant parameters of water at the water valve switch; the control module is used for acquiring relevant parameters of water, transmits the relevant parameters to the outside through the communication module, and receives a control command transmitted by the outside; the communication module is used for communication with the outside through narrow band Internet of Things; the control execution module is used for executing corresponding operations on the water valve switch according to the control command transmitted by the control module; and the power supply module at least comprises a mini-type water power generator and is used for supplying power for other modules through water power generation at the water valve switch. Owing to application of the narrow band Internet of Things, the communication range is wider, the cost and the power consumption are low, and the structure is more optimal. Owing to application of the mini-type water power generator, power supply is stable and energy-saving, and accordingly, the communication stability is guaranteed.