The invention discloses a cross-processing unit adapting method, system and device. The method comprises: obtaining a received cross signal after cross-processing; performing adapting process on the cross signal by using preconfigured adapting parameters, so as to obtain service signal according with the service processing requirement, wherein the adapting parameters is predetermined according toparameter information of the cross signal and service signal. The invention also discloses a system and device of realizing adaption of the cross unit. Through performing the adapting process on the cross signal after cross-processing and the service signal required by the service processing unit, the method realizes that the different cross-processing unit can be used matching with the same service processing unit, therefore the cross-processing unit of different types can be hybridly used, and resource waste is reduced.