For decades, the scope of an enterprise becomes huge day by day. In order to adapt to the rapid changing environments, it is necessary that an enterprise considers the re-engineering of organizational structures and functional processes altogether. The enterprise's administrators, while re-enginerring enterprises, need an applicable business architecture to be the Model. While setting up the business architecture, we must dialyse such factors as organizational structures, functional processes, etc. to build up the most suitable strategy. While re-enginerring enterprises, a better result comes out if organizational structures and functional processes are considered altogether. Currently, business re-engineerings adopted by an enterprise belong to process-oriented business re-engineerings. Process-oriented business re-engineerings focus mainly on an enterprise¡¦s functional processes and neglect the relationship between organizational structures and functional processes. The achievement is always not so good as expected. Embracing organizational structures and functional processes in concert and harmony, it has offered and organized advantages received after business re-engineering, the best shared practice and experience. This research probes into architecture-oriented business re-engineerings. This research leads business re-engineering and starts from the process-oriented business re-engineering that most enterprises choose now. And from ¡§organizational structures and functional processes in concert and harmony,¡§ it carries on business re-engineering necessary terms to succeed in to prove, still lies in: ¡§organizational structures and functional processes in concert and harmony,¡¨ ¡§tactics architecture of globality,¡¨ ¡§carry on the re-engineering to the cardinal or key architecture,¡¨ ¡§trans-departmental architecture re-engineering groups,¡¨ ¡§comprehensible enterprise architecture perspective,¡¨ ¡§understanding and analysing business architecture,¡¨ etc. This is exactly one of the elements that architecture-oriented business re-engineering needs too. It is expected that it can lead to an important reference that the business re-engineering requires. According to the above conclusion, we find that an enterprise can be benefited by the contribution of this research. It also provides administrators or executives many suggestions that support implementing business re-engineering of an enterprise. Key Words: Business Architecture, Architecture-Oriented Business Re-engineering, Process-Oriented Business Re-engineering, Organizational Structure, Functional Porcesss