Dynamic alliance enterprise is dynamic open system, is a benefit common composing of various contracts. Each member enterprise is interrelated with one another in benefit. Each member is a co-operative competing organization. This paper proposes that the vague distinction between each other, risk, difference in culture and highly unstable of dynamic alliance enterprise are main reasons for common management. Therefore, management of dynamic alliance enterprise is different from management in market mechanism or single enterprise. Management of dynamic alliance enterprise is combining inner management with outer management. The key to inner management is smoothing relations of common management. The key to outer management is building trust guarantee mechanism. The base of common management is building effective information system.