Disclosed are an instant messenger (IM) method, client and system based on a dynamic image grid, the method comprising: adding an icon and/or a phonetic symbol combination to an image grid input interface, and editing the same to generate dynamic image grid information; selecting one image grid from the image grid input interface, operating an editing sub-unit of the image grid and sequentially adding a unit instruction of the editing sub-unit to a unit instruction list; and repeating the above operation until the editing of the image grid input interface is complete, and sending the unit instruction list. Compared to a traditional IM method, the present invention enables a user to participate in the process of information creation and parsing, thus providing the user with a larger space for imagination and development, and enabling the user to express their feelings in a more enriched and interesting way.