Objective Plantar pressure data can be used to evaluate the rehabilitation process of lower extremity joint diseases. Based on this, this paper designs a system for acquiring, analyzing, and evaluating plantar pressure signal. Methods The system is divided into a data acquisition module and a data receiving and processing module. The analysis results are displayed in two modes: mobile terminal and computer terminal. The mobile terminal uses an OLED screen to display the result of the plantar pressure center (COP) trajectory. The computer terminal uses LabVIEW and Matlab software to jointly program and uses a graphical interface to display the plantar pressure dynamically in real time. Results By simulating the experimenter, the system can obtain accurate test results. Conclusion The system has certain reliability and stability. In the later stage, the analysis algorithm of pressure data is added to obtain other meaningful data indicators.