Plant image acquisition device and image acquisition method thereof

The invention relates to a plant image acquisition device and an image acquisition method thereof. The plant image acquisition device comprises a first mirror plane, a first image acquisition device, an image processing module and an operating processing module. The first mirror plane is disposed at one side of an image measurement position so as to generate an inside-the-mirror image of a plant arranged at the image measurement position. The first image acquisition device obtains at least one image including a direct-sight image of the plant and the first inside-the-mirror image. The image processing module takes the frame of the first mirror plane as the characteristic, and segments and obtains at least one image including a direct-sight image of the plant and the first inside-the-mirror image. The operating processing module restores the inside-the-mirror image of the plant so as to obtain a first image of the plant.