The purpose of this research is to contribute an analysis method to real-time/unreal-time detection of the performance of the onboard Automatic Dependent Surveillance (ADS ) signal end-to-end transmission during the civil aircraft development and validation phase. Establishing ground test platform is completed as well. Working with the onboard system, this ground platform is capable to locate failures during the test, help with the failure removal and analysis, and estimate the onboard ADS systems' working status intuitively. This research contributes a promotion to the onboard-ground aircraft test, civil aircraft ground validation ,civil aircraft flight validation of the onboard automatic dependent surveillance-contract (ADS-C) and automatic dependent surveillance-broadcast(ADS-B) system. It also offers benefits to the maintenance and custom service work after the aircraft delivery.