Disclosed are techniques for an electronic device and a method for clustering face image data in an electronic device. Responsive to a second cluster generation unit generating a new second cluster, a plurality of first clusters generated by a first cluster generation unit and a plurality of second clusters generated by the second cluster generation unit are compared, and a third cluster may be generated on the basis of the comparison by merging a first cluster including first face feature data among the plurality of first clusters and a second cluster including the first face feature data among the plurality of second clusters.