With regard to the limitations of the modeling and description of super- scale information systems in thepervasive computing environment,we establish a novel software architecture model which is named as COA (com-munity- oriented architecture).COA provides new modeling and descriptive methods for more complicated and grea-ter information system as well as a new solution to the design and planning of super- scale information systems.Inthe COA model,community,as a single cluster to agent,becomes a new factor of modeling just as components arethe integration and cluster of basic objects.On the basis of traditional WRIGHT language,the grammar is extendedproperly and CSP is adopted to deal with the operational semantics,thus forming a new type of systematic descrip-tive language which is faced with COA.Finally,in combination of a virtual application scene of pervasive compu-ting,a description case based on COA is presented,and the role and significance of the COA model in the perva-sive computing environment are expounded.