An electronic device is provided. The electronic device includes: a memory storing a neural network model; and a processor configured to: obtain a plurality of individual graphs based on an access history for a plurality of contents over a plurality of sessions; generate an integrated graph, in which the plurality of individual graphs are integrated, based on a connection relationship between nodes included in the plurality of individual graphs and a number of times each connection between the nodes is repeated; obtain a plurality of augmented graphs by augmenting each of the plurality of individual graphs based on the integrated graph; and train the neural network model to provide recommended content based on the plurality of augmented graphs.