An electronic apparatus is disclosed. The electronic apparatus includes a memory configured to store at least one instruction. The electronic apparatus also includes a processor, connected to the memory, and configured to control the electronic apparatus. The processor is further configured to identify a type corresponding to each of a plurality of sentences included in a document. The processor is also configured to group the plurality of sentences into a plurality of sentence groups based on the identified type, and summarize at least one sentence included in each of the plurality of sentence groups based on a user's preference for types of each of the plurality of sentence groups.