Control method of numerical control system, numerical control system and device with storage function

The invention discloses a control method of a numerical control system, the numerical control system and a device with a storage function. The control method comprises the steps of receiving a machining program of a workpiece, and compiling the machining program to obtain a first machining path of a cutter for machining the workpiece, judging whether the first machining path needs to be subjected to first interpolation or not, if not, conducting rotating cutter center point transformation on the first machining path, so that a second machining path is obtained, predicting the machining speed of the cutter according to the second machining path, and planning the machining speed of the cutter according to the predicted machining speed, and performing second interpolation on the second machining path to obtain a second machining path interpolation point, and forming a third machining path according to the second machining path interpolation point and outputting the third machining path. According to the method,