The invention belongs to the technical field of automatic control of automobiles, and particularly relates to a detecting system of a master control board of an automobile AMT (advanced manufacturing technology) system. The detecting system comprises a personal computer (PC), a detecting board, a signal generator and a handle, wherein the personal computer (PC) is used for controlling the detecting board and the signal generator and receiving a detecting result returned by the detecting board, has a detecting result outputting and displaying function, a detecting command issuing function, a function of downloading a driving program of a detected board and a function of outputting a command for controlling the signal generator; the detecting board is used for receiving the command of the personal computer (PC), outputting different commands to the detected board, receiving various feedback results of the detected board, analyzing and judging the results and feeding back the results to the personal computer (PC); the signal generator is used for receiving the commands of the personal computer and outputting first signals and second signals which simulate an automobile traveling environment; and the handle is used for simulating control intention signals which simulate driving of a driver.