Software test has recently been a large-scale and complicated artifact, as is the software itself. There can be a test project with over one million test cases, over twenty test types, over ten test levels and many test cycles. Technologies of large-scale and complicated software testing have just begun to advance and must be boosted. Test architecture technology has just arising according to software architecture technology. There are several research just on notations or concepts for test architecture such as UML Test Profile and NGT. Based on the notations, research on modeling are necessary next. They include design principles, patterns, frameworks, tools, methodologies etc. In this research we show ten design principles in test architecture: coupling, cohesion, maintainability, automatability, circumstance consistency, development consistency, describability, design direction, design positiveness and execution velocity consistency.
