From the perspectives of convenience, high efficiency, energy saving and accuracy, a wireless electro-optical sensor network based on MC9S12XS128 is established. Hardware circuits of controllers are de. signed combined with MUC intelligence control theory. On the basis of analyzing structure and operation theory of wireless electro-optical sensor networks, the achievement modes of wireless electro-optical sensor networks based on ZigBee technique are discussed. Relative hardware circuits and software are also designed. MC9S12X128 MCU is used as controllers in node systems. CC2420 chips are used as wireless transmission. And data collection and process course are performed in ambience. The results are transmitted to upper PC finally. Da. tum are analyzed and displayed by upper PC in order to monitor the local operation states in real time. The new electro-optical wireless sensor networks system has the characteristics of high accuracy, high efficiency and high efficiency data collection in the field of monitoring area.