The rapid development of mobile communication and mobile devices offers the opportunity to develop mobile learning systems that are able to assist us in our daily lives or professional situations. This paper presents a contextual mobile learning system framework, which allows us to learn mastering domestic and professional equipments on using mobile devices like Tablet PC, PDA or Smartphone. Just in time learning, learning and doing, and collaborative learning theories are appropriately blended for offering more effective task-centered learning experiences in our approach. The main principles and development process such as contextualization with RFID and production of learning units are introduced. At the end, a concrete learning scenario experiment for computer maintenance is evaluated.