An apparatus and method for recognizing an emotion by use of a heart rate data is provided. The apparatus includes an input signal generation unit configured to receive a plurality of heart rate data, and generate input signals each having a sequence, a signal classification unit configured to classify the input signals into groups, and an emotion recognition unit configured to search for a group, to which the input signal generated by the input signal generation unit belongs, among the groups classified by the signal classification unit, and recognize a user emotion corresponding to the found group.