Electromechanical systems, owing to numerous applications such as in telecommunications, instrumentation, healthcare, energy and environment, have dramatically impacted the way we live. This course will provide a coherent presentation of the fundamental concepts, design, fabrication methods underpinning the electrochemical systems, in the context with contemporary applications in engineering. Various skills to analyse the electromechanical system at multiple length and time scales will be covered. The challenges facing the current electromechanical systems will be discussed as well.