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. <EOS>