Provided is an agricultural remote sensing system. Remote sensors, a POS sensor and a data synchronization device are carried on an unmanned aerial vehicle, so that images conforming to the requirement of spatial resolution can be acquired by controlling the flight altitude of the unmanned aerial vehicle, and geometric splicing is conducted on the images according to position information recorded by the POS sensor, so as to obtain an agricultural remote sensing image in a relatively large area. At the same time, a plurality of remote sensors of different types can be simultaneously carried on a platform of the unmanned aerial vehicle, so that various pieces of image information of different types can be acquired once. On the other hand, in the present invention, after a collection trigger signal is received, the plurality of remote sensors execute the collection of the remote sensing image once, so that the remote sensors can be prevented from always being in an operating state, thereby reducing the power consumption of the unmanned aerial vehicle.
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