The invention discloses a system for capturing equipment flickering fault sources. A plurality of detection channels are connected with a plurality of signal points of controlled equipment respectively, and each detection channel is connected with one signal point. Each detection channel comprises a detection module, a reset module and an RS trigger. One end of each detection module is connected with one signal point of the controlled equipment, and the other end of each detection module is connected with the S end of the corresponding RS trigger. One end of each reset module is connected with one signal point of the controlled equipment, and the other end of each reset module is connected with the R end of the corresponding RS trigger. Each reset module is in a commonly-opened state, and the output end of each RS trigger is connected with a fault indicator. According to the system and method, the signal conditions of the signal points of the controlled equipment are detected through the detection channels, when signal flickering happens, the fault indicator timely captures the flickering, and the purposes that the signal points of faults can be timely found out when the faults occurs to the equipment, maintaining is facilitated, and production can be recovered as soon as possible are achieved.