Provided are a video communication method and a robot implementing the same. The robot includes a camera configured to acquire a first video for a video call, a multi-channel microphone configured to receive a sound signal, a memory storing one or more instructions, and a processor configured to execute the one or more instructions. The processor calculates positions at which a plurality of voice signals included in the sound signal are generated, calculates positions of N users appearing in the first video (here, N is an integer greater than or equal to 2), selects N voice signals generated at the same positions as the N users from among the plurality of voice signals, calculates a ratio of times during which a voice is detected from waveforms of the N voice signals in a previous time period prior to a first time point, and determines a main user of the video call at the first time point on the basis of the ratio of times.