Test system and test method for audio-video device

A test system adapted to test an AVDUT (Audio-Video Device Under Test), comprising:

• an output control circuit adapted to connect to the AVDUT;
• a sensing circuit adapted to connect to the AVDUT and to detect sensible conditions of the AVDUT;
• a storage medium storing a test script and a verification data set related to the AVDUT, wherein the test script comprises a plurality of test instructions, and each of the test instructions comprises a plurality of test signals;
• and
• a processor connecting to the output control circuit, the sensing circuit and the storage medium, wherein the processor generates a test sequence related to the plurality of test instructions and outputs a plurality of control signals to the AVDUT through the output control circuit according to the test sequence, with said plurality of control signals corresponding to the plurality of test instructions, and the processor receives said sensible conditions through the sensing circuit and determines whether an abnormal event occurs in the AVDUT according to said sensible conditions and the verification data set;
• wherein, when the abnormal event occurs, the processor sequentially writes at least one of the test signals into the storage medium, with said at least one written test signal corresponding to a part of the test sequence right before an occurrence of the abnormal event;
• wherein, the processor compares said at least one written test signal and the test signals of one of the test instructions, and determines whether to update the test script according to a comparison result.