An image acquisition device comprising: a main body structure provided with an image acquisition means and at least two accommodating structures, the at least two accommodating structures comprising a first accommodating structure configured to place a first target object and a second accommodating structure configured to place a second target object, wherein the first accommodating structure is arranged at a first position of the main body structure, the first position satisfying the condition that the first target object placed on the first accommodating structure is located within acquisition area coverage of the image acquisition means; and the second accommodating structure is arranged at a second position of the main body structure, the second position satisfying the condition that the second target object placed on the second accommodating structure is located within the acquisition area coverage of the image acquisition means, characterized in that the first target object is directly disposed on the first accommodating structure, wherein the first accommodating structure and the second accommodating structure are distributed in a layered structure, and the first accommodating structure is located at an upper layer of the second accommodating structure, wherein the main body structure is provided with a recess structure, wherein an opening of the recess structure faces a first side surface of the main body structure, and the first side surface is provided with the first accommodating structure, which comprises: a first hollow structure is provided at a first position on the first side surface corresponding to the opening of the recess structure, and a slot for fixing the first target object is provided at the periphery of the first hollow structure. the first accommodating structure is arranged at a first position of the main body structure, the first position satisfying the condition that the first target object placed on the first accommodating structure is located within acquisition area coverage of the image acquisition means; and the second accommodating structure is arranged at a second position of the main body structure, the second position satisfying the condition that the second target object placed on the second accommodating structure is located within the acquisition area coverage of the image acquisition means, characterized in that the first target object is directly disposed on the first accommodating structure, wherein the first accommodating structure and the second accommodating structure are distributed in a layered structure, and the first accommodating structure is located at an upper layer of the second accommodating structure, wherein the main body structure is provided with a recess structure, wherein an opening of the recess structure faces a first side surface of the main body structure, and the first side surface is provided with the first accommodating structure, which comprises: a first hollow structure is provided at a first position on the first side surface corresponding to the opening of the recess structure, and a slot for fixing the first target object is provided at the periphery of the first hollow structure. a first hollow structure is provided at a first position on the first side surface corresponding to the opening of the recess structure, and a slot for fixing the first target object is provided at the periphery of the first hollow structure.