Method and apparatus for displaying associated information in electronic device

An electronic device comprising:

• a display unit to output a function processing screen of the electronic device and to display, when a function associated with a specific counterpart is executed, information found in relation to the counterpart;
• a control unit to control a process of collecting at least one of communication log information related to the counterpart, schedule or memo information related to the counterpart, voice information during a call with the counterpart, and social content information related to the counterpart, and displaying, when the function associated with the counterpart is executed, at least of information that is stored so as to be mapped with identification information of the counterpart and an item for the stored information on the display unit;
• and
• a storage unit to store information so that the information is mapped with the identification information of the counterpart.