Abstract: Bluetooth technology was selected to solve the difficult problem of transmission in short distance after analyzing the advatages and shortcomings of different technologies of wireless communication including 802.11b,HomeRF,IrDA and Bluetooth,and a scheme of wireless data transmission system based on Bluetooth technology was presented.Furthermore,the paper analyzed the theory and protocol specification of the Bluetooth communication and RFCOMM protocol,a Bluetooth system model which(replaced) serial cable was established based on Bluetooth serial port application framework,a hardware was designed based on single-chip Bluetooth module from the CSR company,a hardware platform of system was built based on the Bluetooth devices which could realize data transmission of point to point,software arithmetic flow based on the RFCOMM protocol was implemented,the whole system software was(designed) based on the Bluetooth serial port application framework and it was implemented on the hardware platform of the wireless data transmission system.The testing result showed that the RFCOMM(service) function of Bluetooth module was perfect and the system was stable.