Abstract. This paper proposes a method to represent agent Unified Modelling Language (AUML) in logic form using F-logic that provides deductive capability and uniform knowledge integration base. The AUML is used to differentiate relevant interaction more precisely at the analysis phase of developing a multiagent system. However, the AUML lacks for foundation and logic semantics. Thus we aim at constructing sufficient formality to facilitate formal analysis and to explore the behaviour and message route of the AUML. The AUML is transformed into F-logic language first by transformation rules. Secondly, a logic interpretation of this agent structure is presented. The transformation processes and results are illustrated using an example of E-commerce system. Finally, the significance of this approach is discussed and summarized.