System, apparatus and method for switching multi-module terminal field

The invention discloses a method, a device and a system for switching multi-mode terminal area, which are used to support the switching of partial media in original conversion. The method of the invention comprises utilizing a multi-mode terminal to send switching request to a switching control entity, identifying whether the switching is the switching to the partial medium of original conversionafter the switching control entity receives the switching request, when the switching which only switches partial media in the original conversion is identified, switching partial media in a second conversation. The multi-mode terminal of the invention comprises an information switching carrying unit and a sending unit. The switching control entity of the invention comprises a receiving unit, an identifying unit and a switching unit. The switching system of the multi-mode terminal area of the invention comprises a multi-mode terminal and a switching control entity. The invention supports the switch to partial media in original conversation.