Aiming at the features of collection and tracking of human motion information, this passage designed a motion information acquisition and wireless transmission device by using inertial sensors. The data collected by the inertial device are transmitted to the main control chip for data processing and splicing, and then sent to the host receiver through NRF24L01 at the same time, and the data processing and analysis are carried out in the upper computer terminal, carry out static and dynamic experimental analysis for the system. The experiment shows that the system has high stability and accuracy, and provides a high reference value for the research of trajectory tracking system or attitude resolution.