Abstract: This invention relates to a robust data fusion procedure of multi-digital surveillance information mounted on an aircraft per se capable of receiving surveillance information of other aircrafts, including traffic information service (TIS), traffic alert and collision avoidance system (TCAS) and automatic dependant surveillance broadcasting (ADSB). The data fusing procedure of the multi-digital surveillance information of this invention is capable of applying data fusion module to provide an effective surveillance data fusion procedure for fusing the data produced by surveillance source (ADSB, TCAS and TIS). The traffic information of the aircraft per se is provided by GNSS while outputting the status information of other aircrafts in the surrounding airspace to the cockpit display traffic information (CDTI) system to enhance airborne security.