An instant messaging communication method, computer program product and apparatus. The instant messaging communication apparatus includes input means for inputting an instant message and a semantic tag for the instant message; a network module for transmitting the input instant message and semantic tag and receiving an instant message with a semantic tag; construction means for constructing a visual topic structural diagram of the transmitted and received instant messages according to the semantic tag; and display means for displaying the visual topic structural diagram. An embodiment of the communication apparatus provides structured guidance to the user's discussion, directs the user to make pertinent announcement and enables the user to easily sum up the main points of the discussion from the log through a visualized topic structural diagram.