A sample test automation system which is capable of reducing the workload of an operator and precisely carrying out necessary processes of each of samples without stagnation. In the sample test automation system, a sample tray 120 on which a plurality of samples 150 can be installed is prepared, an identifier for distinguishing the sample tray 120 is attached to the sample tray 120, a sample introducing unit 10 is provided with an identifier reading apparatus 111 which reads the identifier of the sample tray 120, and information about the samples 150 is switched based on the read identifier of the sample tray 120.