Graphic synthesis method and system and information interaction method and system

The invention discloses a graphic synthesis method and system and an information interaction method and system. The graphic synthesis method comprises the following steps of receiving graphic data sent by a graphic object, corresponding to a first control, in a second subsystem graphic synthesizer by the first control in a first subsystem; and sending the received graphic data to a first subsystem graphic synthesizer by the first control. In the first subsystem, the graphic object in the second subsystem graphic synthesizer corresponds to the first control, and the first control provides a transmission function for graphic data between the two subsystems, so that the compatibility between different operation systems is realized at the level of graphic processing.