In this paper,agamma-ray spectrum measurement system based on MATLAB platform is constructed.The hardware of the system consists of LaBr3 detector,front-end analog circuit,peak detection and holding circuit,trigger circuit and highspeed data acquisition card.The data acquisition and analysis interface is designed by using MATLAB GUI.The preliminary experimental results show that the device has simple structure,convenient data processing and good stability compared with the traditional energy spectrum measuring device.The application of high-speed data acquisition card in ...