In order to realize a portable and miniaturized methane (CH₄) detectio n system with strong data processing ability,combined with ARM11embedded processor and LabVIEW data proc essing platform,an embedded mid-infrared differential methane (CH₄) detection system is implemen ted.In terms of software,S3C6410is selected as the main processor,and WinCE is chosen to be the embedded operation system (OS);Platform Builder tools are used for customizing the kernel files of the OS,and transplanting and installing the OS;LabVIEW with strong data processing ability is used as the data processing platform.Through t he Touch Panel module,a program that can run directly on the WinCE OS is compiled for processing the sensor signal.In terms of hardware,a d ual-channel integrated sensor IR12GJ is adopted.A data acquisition card is used to sample the two sensor sign als after amplification and filtering by a pre-processing circuit,then the two signals are supplied to the LabVIEW s oftware program,and finally the CH_{4concentration} is achieved after data processing.Experiments are carried on the aspects of gas calibration, relative error and stability based on the integrated system.Experimental result s reveal that the measuring range on CH_4is 0.6.5%.The maximum relative detection error on 12CH_4samples is less than 10%.The experimental result on a CH_4sample with a concentration of 0.5% for 4h shows that the detection error is less than 8.3% without considering some individual mutation points.Due to advantages of small s ize of the embedded system and strong data processing capability of LabVIEW,the reported detection system has w ide application prospects.