Since business logic is complex and changes frequently, e-business software architecture becomes more complex and difficult to maintain. From the perspective of software architecture design, this paper proposes a Temporal ECA based Architecture for e- Business systems (TECAB) representing business logic in the form of Temporal ECA, sketches a conflictmanaging mechanism based on Meta-action. The TECAB can separate business logic from business processing reasonably and support dynamic e-business logic effectively. TECAB has been applied to develop CRM system application, integrated with the conflictmanagement mechanism and storing TECA rule and action constraint with XML language.