文章在总结现有智能化概念设计思维规律的基础上，提出基于可拓方法的机械产品智能化概念设计的研究内容、特点、流程与方法。围绕智能化概念设计的功能表达、功能分解与综合、功能推理与决策，重点研究功能-原理-布局-结构的可拓化概念设计方法和计算机模拟人类解决问题的辩证思维过程。文中给出可拓方法在加工中心刀库概念设计中的应用实例。该方法对于解决目前智能化概念设计理论研究与工程实现中的瓶颈问题，具有重要意义。

On the foundation summing up existing intelligent conceptual design method, this article puts forward the research content, characters, path, and method of the conceptual design of extension for mechanical products. Around the core technology of intelligent conceptual design this article conducts research on the modelization method of extension design in function-principle-layout-configuration. It includes the function expression, function decomposition and synthesis, function illation and decision. Computers are utilized to simulate the human dialectic thought when resolve problems in this method. The living example shows that the extension method has been applied in the field of conceptual design for mechanical products. This method is of great significance to resolve the bottleneck problem in theoretic studying and engineering realization of intelligent CAD.