Water quality parameter monitoring device

The utility model discloses a water quality parameter monitoring device. The system comprises a group of water quality parameter acquisition node units, a data acquisition gateway unit and a cloud server unit which are connected together through a wireless network, wherein each water quality parameter acquisition node in the water quality parameter acquisition node unit is provided with a node MCUmodule, and a serial port to RS-485 module, a first 433MHz wireless communication module, a relay control module and a first power supply module which are connected with the node MCU module; the serial port to RS-485 conversion module is externally connected with a water quality sensor; the data collection gateway unit is provided with a gateway MCU module, and a gateway setting key module, a second 433MHz wireless communication module, a gateway data storage module, an Ethernet module, a second power supply module, an NB-IOT communication module, a serial port screen display module and an acousto-optic alarm module