Abstract: A development frame of hydropower simulation system has been introduced based on model driven architecture，it takes UML as the object-oriented modeling tool ，constructs the system from a higher abstract level，describes and summarizes the function，model structure and level，model transformation and code generation，avoids the flaw of the traditional development，makes system modeling become the core of software development.As a case study，the frame has been tested in Fengman Hydropower Station，Jilin province.The generality，advantage and credibility of the system are validated through this experiment；the new method is suitable to realize the large-scale software development，such as hydropower simulation system.