A mobile communication device including a radio communication unit configured to establish a video telephony call between a first user of the mobile communication device and at least a second user of another communication device, a display unit configured to display a first image data of the first user and a second image data of the second user on the mobile communication device, and to display a chatting window on the mobile communication device when a video chatting service is selected such that the first and second users can perform a chatting operation in the chatting window, in which the first and second image data are transmitted/received through the video telephony call, a control unit configured to link chatting data displayed in the chatting window with at least one of the first image data of the first user and the second image data of the second user, and a memory unit configured to store the linked chatting data as a video chatting log.