Electronic devices mounted on electronic equipment board test system and test method

An electronic device test system includes electronic equipment having a board on which pluralities of electronic devices are mounted and isolation means which isolates from surrounding air an electronic device to be tested. When executing an electronic device test, the electronic device to be tested, which is one of the plurality of electronic devices mounted on the board of the electronic equipment, is isolated from surrounding air by the isolation means. After that, a power supply voltage is applied to the electronic equipment and an electric signal is applied to the electronic device for testing the electronic device.