This State of art aims to highlight which innovations are possible in maintenance practice with IoT application, by listing some current best cases. The paper here proposed is organized by presenting a general IoT architecture, usefull in company’s purposes. Then few examples of IoT applications inside FM are presented, by proving the effectiveness of IoT sinergy. Last, scaling down inside FM discilipline, proactive maintenance practices strengthened by IoT deployment are described throught their prevailing implementations.