This Seminar is a fast journey through the build-up of quantum thermodynamics, an emerging field at the crossroad between quantum information, quantum open systems and stochastic thermodynamics. Born at the time of industrial revolution to optimize the exploitation of thermal resources, the concepts of thermodynamics have been adapted to small systems where thermal fluctuations are predominant. Extending the framework to quantum fluctuations is a great challenge of quantum thermodynamics, that opens exciting research lines e.g. measurement fueled engines or thermodynamics of driven-dissipative systems. On a more applied side, it provides the tools to optimize the energetic consumption of future quantum computers.