The form of built environments is aeemi-tonomous entity: it h an Initiato resist changes until its capacity is exhausted to accomodate new progranme. It follows that new forms must come out of the old ones, and the courses e evolutionary rather than revolutionary in nature, which suggests that the line of transformations can be retraced, and can be made explicit, at least conceptusily. This is the background idea as well as the central issue to which this study intends to address. In the last few decades Taiwan grew into a new industrialized country with remarkable economic success, but so experienced unprecedent, and so unpleasant environmental changes: wasted fm land, uncontrolled urban expansion, and overloaded traffic systems. This ilt-managed growth however provides filylae nountotdatainteresting to the studies of the transformations of built environments In relation to the socio-economic developments. This per investigate apcula phenomenum concerning the emergence of built form type, which is always an stimulating topic for those who care about, and so would like to te pal in building our everyday life environments. FACTORY-VILLA: AN EMERGING NEW TYPE Factory-villa is a new naiie of the building that mixes adwelling unit and asml factory. As a type of living, it is not a new invention, and can be dated back long before the modem life divorced the living and the working. But the type as a built form deliberately produced and marketed is rather a recent and local event occured only afew yeas o in most couniryskies of southern Tawan where form lands become available for new developments. The land pattern of a typic southern city that constitutes pat of Taiwan's mor manufacturing region can be characterized as an urban core surrounded by many factories of which near 80% are small and medium in size operated on the family basis. These factories we independent, yet informally networked to form an efficient and dynamic working system that contributes significantly to Taiwan's economical growth. Although shifting from forming to industrial works, the family structure largely leaves intact. The first generation of this socio-economic change is physically manifested by a multistoroy residential structure with an attached factory to keep the whole family still under one root, which Is not unlike the traditional life in the courtyard house. As the younger generations form their own fanillee and start their independent manufacture, the demand for asml house with a proper factory for the new couple and a few employees becomes a rather urgent and profitable business. Agnsi this background the so called factory-villa peas in the scene. EMBEDDING RULES N FORMS Factoryvilla has many variations. This par provides detailed descriptions and analyses such that a rule system cat be formulated Into guidelines for further development of the type. In this study we have witnessed the emergence of a built form type which vindicates to us that the type is the result of a long course of building evolution seeking a particular spatial arrangement in which the socio-economic needs and environment requirements can reach astIe state of relations. Form is organic, it transforms as the life in it develops.