.Design of the Data Acquisition System Based on STM32ABSTRACTEarly detection of failures in machinery equipments is one of the most important concerns to industry. In order to monitor effective of rotating machinery, we development a micro-controller uC/OS-II system of signal acquisition system based on STM32 in this paper. we have given the whole design scheme of system and the multi-channel vibration signal in axis X, Y and Z of the rotary shaft can be acquired rapidly and display in rea