The acoustic inertial device is a kind of novel inertial device which has the features of high operating frequency, high quality factor and simple package. The acoustic inertial device has size and cost advantages over other inertial devices. Based on analyzing the reports on the acoustic inertial technology at home and abroad, the development status and applications of acoustic inertial technology have been overviewed and commentated in this paper. The future trends of acoustic inertial technology are also prospected.