In the past several years, the usage of network is getting more and more popular and various types of network applications also have vigorous advancement. Because the benefits which network applications produced obtain a lot of enterprise's attention, each enterprise is eager to introduce the network to unify each kind of information system, and expects to achieve the synthesis effect as well. At present, the network system has been an indispensable infrastructure in the enterprise, but how to make it effective becomes a tough issue in an enterprise¡¦s business plan. In 1997, the International Standard Organization proposed the OSI Network Management Model, is also named FCAPS Model, to apply on the data network. FCAPS Model is mainly to define the functional scope of the network management system. Though it is easy to understand, it does not have the deeper explanations how to achieve these functions. Also, FCAPS fails to tell who should do what in a network system. As a result of such deficiencies, the enterprise often doesn¡¦t know how to do to apply FCAPS into the planning of a network management system. This research develops a network management architecture description language (NMADL) by using the concept of system architecture to construct an architecture-oriented network management model (AONMM). AONMM is an integrated model which consists of the viewpoint of structure and behavior. By integrating the structure and behavior into one unity, it clearly and completely describes the network management system. Furthermore, this research analyzes the problems of FCAPS Model and compares it with AONMM to verify AONMM¡¦s superiority. AONMM is a valuable referenced model for planning, analyzing and designing network management systems.