The invention discloses an internet-of-things system based on an aquaculture intelligent node of an IPv6 (Internet Protocol Version 6). A network node of the system comprises a dissolved oxygen sensor, a ph sensor, a water temperature sensor, a barometric pressure sensor, a wind direction sensor, a solar radiation sensor, an aerator, a bait casting machine and a water pump, wherein the dissolved oxygen sensor, the ph sensor and the water temperature sensor are connected with a microcontroller and placed in aquaculture water; the barometric pressure sensor, the wind direction sensor and the solar radiation sensor are connected with the microcontroller and placed in an aquaculture site environment; and the aerator, the bait casting machine and the water pump are connected with the microcontroller and used for controlling an aquaculture site. A streamlined embedded TCP/IP (Transmission Control Protocol/Internet Protocol) protocol stack uIP (User Interface Process) is adopted by the microcontroller, and IPv6 communication is supported. After the dissolved oxygen, the ph, a water temperature parameter and a meteorological parameter of the aquaculture water are analyzed and processed by the microcontroller, an aquaculture equipment control instruction is output. At the same time, a TCP/IP data packet of communication data is processed, so as to realize digital aquaculture of remote data collection, remote control, remote monitoring and remote management of the network node.