This paper presents a novel object-oriented model, which is based on the Real-Time Unified Modeling Language (UML) and Modelica language combined with hybrid automata to effectively analyze, design and implement controllers of industrial Hybrid Oy'namic Systems (HOS). This model also allows the developed generic artifacts to be customizable and re-usable in the design phase of new HOS control applications. The paper brings out step-by-step the dynamic analysis model of an industrial HOS specified by hybrid automata, as well as the detailed design model of HOS controllers carried out by specializing Real- Time UML, that permits us to quickly find out the main control capsules, their ports and communication protocols in order to precisely model and tightly allocate control structures corresponding with dynamic behaviors for the implementation model of industrial HOS. The detailed design model is then converted into Modelica models in order to quickly simulate and implement the controller of this HOS. Based on this approach, a controller of electro-hydraulic governor for small hydropower stations is completely designed and simulated.