The invention provides an electronic device comprises an image collection unit and a control method applied to the electronic device. The electronic device comprises an input unit for receiving depth of field instruction information from an external, wherein the depth of field instruction information is the information related to the distance between the electronic device and a to-be-collected target object; the collection unit which comprises N image collection modules, wherein the N image collection modules can form multiple different baseline distances; and a processing unit which is used for selecting the baseline distances based on the depth of field instruction information, selecting the image collection modules from the N image collection modules based on the selected baseline distances, controlling the selected image collection modules to collect the images of the target object at the selected baseline distances synchronously and calculating the depth information of the target object by utilizing the collected images of the same target object. Through utilization of the technical scheme provided by the embodiment of the invention, the depth information of the scenes of different distance ranges can be obtained flexibly.