Simulation is the imitation of a system or a process in order to manage the complexity of simulated system or to optimize its performance. This paper presents a agent-based strategy of modeling and simulation.We introduce some modelling methodologies in order to determine the most adequate technique to deal with embedded control systems. We also introduce the Tropos and Agentology methodologies by describing used concepts and how they are integrated with the current stages of Tropos and Multi-agent System methodology. The above is illustrated using an embedded real-time control system as a case study.