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Gas transmission pipeline for management and monitoring are specially arranged densely in the chemical industrial zone, so it is very important to detect remotely gas leakage of flammable, explosive, toxic and other gases in the pipeline. Traditional testing equipment has some limitations and need design data acquisition terminal which can be networked, small, and low-cost. In view of this, a data acquisition terminal based on GTM900-B is designed, which can be used to make up Chemical industrial zone gas detection system based on GPRS network. The terminal can send gas leakage data of combustible gas, CL2 and NH3 to phone or computer management center and have alarm function. Software and hardware testing results and practical application results both have shown its feasibility and validity.