Pattern plays a vital role in software architecture and it is a general reusable solution to commonly occurring problem. Software architecture of a system is the set of structures needed to reason about the system, which comprise software elements, relations among them, and properties of both. Patterns can be implemented at run-time; they identify key resource constraints and best practices. Architecture Pattern expresses a fundamental structural organization or schema for software systems. Patterns in software architecture, offer the promise of helping the architect to identify combinations of Architecture or Solution Building Blocks that have been proven to deliver effective solutions. In Internet banking, we analyzed some attributes such as reliability, security, availability, load balancing and so on. The use of patterns, which is of a reusable component, is a good tool to help designers build load balancing systems. In this paper we are going to propose pattern based adaptive architecture for internet banking system and so the above attributes can be improved by the usage of patterns.