Religion is in itself formed by some fundamental bases which have permanent and perennial characters. These are the common denominators shared by the believers living at different times and places. However, in addition to these unvariables there are some principles which vary according to conditions the believers live in. In Islamic literature there are such concepts as tecdid, ictihad which are employed to apply these principles to various conditions. In this context, one of the most remarkable trends in recent times is to discuss the innovation or reform in Islamic thought. The article here is putting forward another approach to the nature, structure and method of this innovation.