The data acquisition and life prediction system of gas laser is designed in this paper. The ARM STM3210B module is used as the core of hardware platform. The software platform is composed of parameter setting module, measurement modules of threshold current and optimum operating current, life test module, life analysis and prediction module, reanalysis module of report form and historical data. This article expounds emphatically the relationships among different modules. Meanwhile, the design idea of data exchanges among system software, analysis algorithm and hardware drive is realized successfully.