A device and method for recognizing an object included in an input image are provided, the device for recognizing the object included in the input image includes a memory in which at least one program is stored; a camera configured to capture an environment around the device; and at least one processor configured to execute the at least one program to recognize an object included in an input image, wherein the at least one program includes instructions to: obtain the input image by controlling the camera; obtain information about the environment around the device that obtains the input image; determine, based on the information about the environment, a standard for using a plurality of feature value sets in a combined way, the plurality of feature value sets being used to recognize the object in the input image; and recognize the object included in the input image, by using the plurality of feature value sets based on the determined standard for using the plurality of feature value sets in the combined way.