The invention discloses a dissolved oxygen intelligent transducer, comprising: a dissolved oxygen probe, a temperature electrical conductivity probe, an inciting signal source, a signal conditioning module, a transducer electronic data sheet (TEDS) memory, a microcontroller, a power module and a bus interface module. The dissolved oxygen intelligent transducer integrates the dissolved oxygen probe, the temperature electrical conductivity probe, the TEDS memory, the microcontroller and the bus interface module. The dissolved oxygen probe is used for collecting the dissolved oxygen signal of a water effluent body and the temperature electrical conductivity probe is used for collecting the temperature signal and the electrical conductivity signal, the microcontroller is used for calculating the dissolved oxygen content, the electrical conductivity, the temperature and the practical salinity according to the TEDS parameter memorized in the TEDS memory and the processed dissolved oxygen signal, the temperature signal and the electrical conductivity signal, and output the same by the bus interface module, thus realizing the temperature compensation and salinity compensation for the dissolved oxygen measurement and the online detection of the water body dissolved oxygen.