A sensor management device, configured to receive a plurality of sensor information from a plurality of wireless sensors (4∼6) that acquire the plurality of sensor information respectively by performing sampling for plural times at predetermined cycles in a common period, the sensor management device comprising: a transmission unit configured to transmit acquisition start instructions for starting acquisitions of the plurality of sensor information to the plurality of wireless sensors respectively at different timings; and an extraction unit configured to extract a plurality of common period sensor information, which the plurality of wireless sensors has acquired in the common period, from the plurality of sensor information with reference to deviations of times at which the transmission unit has transmitted the acquisition start instructions to the plurality of wireless sensors, characterized in that the extraction unit extracts, from the plurality of sensor information, the plurality of common period sensor information that the plurality of wireless sensors has acquired respectively at or after a time that is the latest among respective times at which the transmission unit transmits the acquisition start instructions to the plurality of wireless sensors, that the transmission unit further transmits transmission instructions for causing the plurality of sensor information to be transmitted to the plurality of wireless sensors respectively at different timings, and the extraction unit extracts, from the plurality of sensor information, the plurality of common period sensor information that the plurality of wireless sensors have acquired respectively at or before a time that is the earliest among respective times at which the transmission unit transmits the transmission instructions to the plurality of wireless sensors. a transmission unit configured to transmit acquisition start instructions for starting acquisitions of the plurality of sensor information to the plurality of wireless sensors respectively at different timings; and an extraction unit configured to extract a plurality of common period sensor information, which the plurality of wireless sensors has acquired in the common period, from the plurality of sensor information with reference to deviations of times at which the transmission unit has transmitted the acquisition start instructions to the plurality of wireless sensors, characterized in that the extraction unit extracts, from the plurality of sensor information, the plurality of common period sensor information that the plurality of wireless sensors has acquired respectively at or after a time that is the latest among respective times at which the transmission unit transmits the acquisition start instructions to the plurality of wireless sensors, that the transmission unit further transmits transmission instructions for causing the plurality of sensor information to be transmitted to the plurality of wireless sensors respectively at different timings, and the extraction unit extracts, from the plurality of sensor information, the plurality of common period sensor information that the plurality of wireless sensors have acquired respectively at or before a time that is the earliest among respective times at which the transmission unit transmits the transmission instructions to the plurality of wireless sensors.