The invention discloses a low-voltage current transformer integrated detection system and a method thereof. The system comprises a transformer integrated test bench and a transformer integrated test control cabinet, wherein the transformer integrated test bench is used for completing primary and secondary wiring of the low-voltage current transformer; in match with each instrument inside the transformer integrated test control cabinet, a detection result is transmitted to a computer. Through the above detection device and the detection method, repeated devices can be avoided, and all tests can be completed on one platform only by simple wiring after mounting.