An instant messaging method and system, and an electronic apparatus are provided. An instant messaging interface is activated in the electronic apparatus. A preview area is added to the instant messaging interface after the instant messaging interface triggers an edit mode. After one of message contents in the instant messaging interface is determined to be selected as an edited target, a message content object corresponding to the selected edited target is displayed in the preview area of the instant messaging interface. A touch operation corresponding to the edited target is received in the instant messaging interface, and attribute data is generated based the touch operation. The message content object corresponding to the selected edited target is adjusted in the preview area based on the attribute data.