A method for providing a service based on a user's voice includes steps of extracting a voice of a first user, generating text information or voice waveform information based on the voice of the first user, analyzing a disposition of the first user based on the text information and the voice waveform information, and then selecting a second user corresponding to the disposition of the first user based on the analysis result, providing the first user with a conversation connection service with the second user and acquiring information on a change in an emotional state of the first user based on conversation information between the first user and the second user, and re-selecting the second user corresponding to the disposition of the first user based on the acquired information on the change in the emotional state of the first user.