The paper proposes a framework for supporting maintenance services in industrial environments through the use of a mobile device and Augmented Reality (AR) technologies. 3D visual instructions about the task to carry out are represented in the real world by means of AR and they are visible through the mobile device. In addition to the solutions proposed so far, the framework introduces the possibility to monitor the operator’s work from a remote location. The mobile device stores information for each maintenance step that has been completed and it makes them available on a remote database. Supervisors can consequently check the maintenance activity from a remote PC at any time. The paper presents also a prototype system, developed according to the framework, and an initial case study in the field of food industry.