產品造形的源由有相當多的考慮，除了在功能上的考量之外，另因人因工程方面 需考慮到操作的尺寸、使用環境和產品本身內在的結構。以上所描述乃是以理性因素為出發 點， 進而有關於人類心理與生理的反應現象之各種知覺 (視覺、觸覺、感覺 ) 問題，會受 到產品造形的記號所影響，因此，在考慮產品造形時，應根據使用者的習性和經驗，確實發 揮造形記號的意義功能。如果產品符號的呈現可以向使用者清楚的表達操作程序或方法，產 品造形的目的就達到了。而將記號原理適當的應用於產品造形上，作為產品設計的學理發展 方向之一，乃是本文所探討的主要內容與目標。

　　　　　Many factors ought to be taken into consideration in developing the product form. In addition to the functional view, designers also need to consider the operation dimensions, the user's environment and the internal mechanism of a product. The attention paid to these points is due to the fact that human's physical and psychological reaction.(i.e., Visual, tactile and perceptual feeling) will be affected by the meaning of the product form. As far as the product form is concemed, it should be developed according to the user's habits and experience so as to make explicit the semioties. If the product form can clearly express how it works by itself, then the semiotic function is fulfilled. To use the semiotic theory applying on the product form appropriately as a development method of product design theory will be the main content and aim of this study.