The invention provides a monitoring sensor node deployment method and device. The method comprises the following steps: determining the maximum side length of regular net unit according to the system sampling spacing and the communication range of the monitoring sensor node; setting the regular net unit according to the value of the maximum side length; and arranging the monitoring sensor node inthe regular net unit. The application requirements of the modern agriculture can be met through the above treatment so as to provide the basic scheme for the monitoring sensor node arrangement applied in the field environment normal continuous sampling, facilitate to promote the practicality process of the wireless sensor network technology and break the bottleneck of obtaining the farmland information high spatial and temporal resolution and performing dynamic monitoring during the modern agricultural management.