Abstract: A multi-port data collection system serves as a PC real-time burn-in testing system. It is used to overcome the conventional burn-in system disadvantages of excessive man-power requirements and low efficiency. The system includes a monitoring device to real-time monitor the burn-in states of a plurality of PCs undergoing testing. Each PC being tested executes a program to perform the burn-in test and generate test data representing the test results. After collecting the data, the monitoring device displays the result of each machine undergoing testing using windows on the monitor screen. Using the multi-port data collection system of the present invention, the maximum number of machine undergoing testing exceeds 4096. The present invention can real-time display the states of machines being tested, record data automatically, and help to handle the production state. This test data can also be used to analyze why a particular error occurs and to determine the failure percentage of machines.