Abstract:In order to automatically control the gas flow in dynamic geogas sampling and monitor the environmental parameters of the samping points,a intelligent dynamic geogas sampling device based on STM32F103RBT6 Micro-controller is designed so as to make effective control and scientific evaluation to the quality of the samples.It can extract geogas in field work at a accurate pumping velocity according to the given flow value, measure the parameters of temperature and humidity at the sampling site and draw up the dynamic flow curve,what's more,storage the flow curve and the parameters of temperature and humidity to SD card.