NUMERICAL CONTROL METHOD

A numerical control method for a numerical control device which executes processing based on a machining program composed of multiple items of numerical control command data such as numerical command data and G-code data. Each item of the G-code data is expressed in the form of an alphabetic character G, a numerical value following G, and a code following the numerical value. The method includes inserting the items of G-code data in the machining program at suitable locations, subsequently discriminating the G-code data, and causing the numerical control device to execute processing specified by the discriminated G-code data.