An apparatus for detecting manufacturing parameters of a machine tool is provided, which comprises at least a sensing and transmitting module, and a receiving module. The sensing and transmitting module has a sensor and a wireless transmitting module. The sensor generates a sensing signal with respect to processing parameter of the machine tool. The wireless transmitting module converts the sensing signal into a wireless signal and transmits the wireless signal to the receiving module. Then the wireless signal is decoded and sent to a processing unit for compensating the machine tool. In the present invention, it is not necessary to consider wiring arrangement so that the sensors can be disposed at positions that are close to the mechanism whose operating status could affect the machining process and the compensation, generated according to the foregoing sensing data, for machine tool will be more effective to improve the machining accuracy.