The intelligent design of a satellite network node was implemented to improve the control accuracy of a satellite system and to solve the problems of fault detection and trouble processing. The system structure of the intelligent network node was established based on an embedded SOC processor. The node was divided into four parts: the diagnosis and On Board Computer(OBC) auxiliary unit, intelligent power management unit, standardization interface unit and the basic function unit. Then, oversampling technology and data fusion processing technology were used to improve the accuracy of the data collection in the diagnosis and OBC auxiliary unit, and the testing error correction method based on redundant detection or direct knowledge was used correct the data errors. In the intelligent power management unit, the self on/off circuit technology was implemented to improve the reliability. Moreover, the wireless standard interface design was adopted in the standardization interface unit. Finally, an experiment was perfornced on a principle prototype of the sun vector measuring instrument to validate the design of intelligent network node. The experimental results show that the accuracy of the sun vector measuring instrument has reached 0.01 °, far higher than the traditional accuracy of 0.1 °. It realizes the state self-inspection calibration, measurement data auto-calibration and the standard interface function and improves the reliability of the system. The network node can finish the fault detection and treatment by itself and can realize the self on/off circuit function. It deals with the space environment from the flip and locking autotono-mously and allows the plug for the single equipment. Furthermore, the node supports quick test, rapid integration and rapid assembly of the satellite systems.