A mobile terminal , comprising: a wireless communication processor configured to receive (S520) a signal from a first external device notifying an emotional state of a first user of the first external device ; a display ; a camera ; and a controller configured to: when the signal notifying the emotional state of the first user is received (S520) while a predetermined application is executed in the mobile terminal , control the wireless communication processor to transmit (S560) the signal notifying the emotional state of the first user to a second external device , activate (S540) the camera and display a preview image on the display obtained by the activated camera in response to the emotional state of the first user being a specific emotional state, control the wireless communication processor to transmit (S570) status information of the mobile terminal to the second external device in response to activation of the camera , wherein the status information includes implementation information of the camera , control the camera to capture (S550) the preview image in response to a predetermined condition without a capture command of a user of the mobile terminal, control the wireless communication processor to transmit (S580) the captured image to the second external device , and output (S530) information indicating the specific emotional state of the first user. a wireless communication processor configured to receive (S520) a signal from a first external device notifying an emotional state of a first user of the first external device ; a display ; a camera ; and a controller configured to: when the signal notifying the emotional state of the first user is received (S520) while a predetermined application is executed in the mobile terminal , control the wireless communication processor to transmit (S560) the signal notifying the emotional state of the first user to a second external device , activate (S540) the camera and display a preview image on the display obtained by the activated camera in response to the emotional state of the first user being a specific emotional state, control the wireless communication processor to transmit (S570) status information of the mobile terminal to the second external device in response to activation of the camera , wherein the status information includes implementation information of the camera , control the camera to capture (S550) the preview image in response to a predetermined condition without a capture command of a user of the mobile terminal, control the wireless communication processor to transmit (S580) the captured image to the second external device , and output (S530) information indicating the specific emotional state of the first user. when the signal notifying the emotional state of the first user is received (S520) while a predetermined application is executed in the mobile terminal , control the wireless communication processor to transmit (S560) the signal notifying the emotional state of the first user to a second external device , activate (S540) the camera and display a preview image on the display obtained by the activated camera in response to the emotional state of the first user being a specific emotional state, control the wireless communication processor to transmit (S570) status information of the mobile terminal to the second external device in response to activation of the camera , wherein the status information includes implementation information of the camera , control the camera to capture (S550) the preview image in response to a predetermined condition without a capture command of a user of the mobile terminal, control the wireless communication processor to transmit (S580) the captured image to the second external device , and output (S530) information indicating the specific emotional state of the first user. <EOS>