The article discusses a new design theory called C-K theory that helps make mechanical design more precise and standardized. The researchers developed a design system on the Solidworks platform for a modular intelligent NC grinding machine. They created a method for designing milling and grinding machines that are customizable, series-based, and easy to assemble. This method allows for automatic generation of 3D models based on user needs. The feasibility of this approach was confirmed through a software example.