Wireless medical endoscope system can perform full gastrointestinal tract examination and eliminate the serious discomfort caused by traditional stomach endoscope. The endoscope system has a complete demo prototype and was delegated to company to be industrialization. This system can not only eliminate patients’ serious discomfort caused by the wired endoscope, but also perform full gastrointestinal tract examination. The digital bidirectional wireless endoscope system used asymmetric transmitting mechanism, according to which the image data of high rate were transferred from inside to outside of the human body and the low-rate control command or the receiving acknowledgement were transferred from outside to inside of the human body. Because of the limit of capsule size and batter capacity, the system had strict requirements on power.