Detection system and method for Ethernet interface link setting time

The invention discloses a detection system and method for Ethernet interface link setting time, and relates to the field of communication. According to the detection system, a reset module outputs a RESET signal to a control module; a processor module control the RESET signal to become a low level from a high level when detection is started; the control module sends a starting signal to a counting module when the RESET signal becomes the high level from the low level and sends a stopping signal to the counting module when a LINK signal becomes a low level from a high level; the counting module begins to count a period of a reference clock signal when the counting module receives the starting signal and stops counting the period of the reference clock signal when the counting module receives the stopping signal, and a counting result is outputted; the processor module calculates the Ethernet interface link setting time according to the counting result and the period of the reference clock signal. According to the detection system and method, the LINK setting time can be measured quickly and accurately, and measuring precision is improved.