Sampling system and sampling method for spectral measurement of field crop canopies

The invention discloses a sampling system and method for spectral measurement of field crop canopies, and belongs to the technical field of crop monitoring. The sampling system for spectral measurement of field crop canopies comprises a shell; an energy storage assembly, a downlink light collection assembly, an uplink light collection assembly, a control communication assembly and an energy management assembly are arranged in the shell, the shell is installed on a supporting frame through a telescopic arm, an energy collection assembly is arranged on the top of the supporting frame, and a movement assembly is arranged on the shell. The energy collection assembly, the energy storage assembly, the downlink light collection assembly, the uplink light collection assembly, the control communication assembly, the energy management assembly and the motion assembly are electrically connected, a reflected light through hole is formed in the bottom of the shell, an incident light through hole is formed in the top of th