The invention provides an automatic test system and method for a GHz analog-to-digital converter. The automatic test system for a GHz analog-to-digital converter mainly includes a DC power supply analyzer, two signal sources, a clock source, a switching filter bank, a logic analyzers, an SPI control module, a test evaluation board, a switch, a test server, a display, and a cabinet, wherein the SPIcontrol module is connected to the test server through a USB cable, and each virtual instrument and the test server are arranged in the cabinet after being connected to the switch through an LAN bus;and based on TestStand and LabView, a host computer software is compiled to complete the control of the each virtual instrument and each module and evaluation of the full parameter characteristics ofthe converter, and then the test results are saved and displayed on the display, and the automatic test of the GHz analog-to-digital converter is finally realized. The automatic test system and method for a GHz analog-to-digital converter can simplify the testing process, can increase the number of measurable parameters of the GHz analog-to-digital converter, can improve the testing efficiency, and can reduce the maintenance cost of the test system software, and at the same time, the automatic test system has preferable compatibility and flexibility.