The invention discloses a digital differential moped system with a gear signal and a speed signal both input to a processor, and belongs to a front wheel and rear wheel differential distribution motor bicycle electricity supply controller system for differentiation aided electricity supply. The digital differential moped system comprises two wheels and two motors of an electricity-aided bicycle, the digital differential moped system comprises a gear signal manual controller and further comprises a differential controller, and the differential controller comprises three modules which are sequentially connected. The first module conducts numeric comparison processing on a feedback current IA and a feedback current IB, the second module conducts model function processing on the data of the first module through a bicycle mean speed signal IS in a selected model function, the third module inputs a gear signal ID to a data distributor 10 of the differential controller 1, and therefore the control data acquired by the controller A and the controller B not only have the elements of the feedback current IA and the feedback current IB and but also have the element of the gear signal ID. The digital differential moped system has the advantages that the two motors of the front wheel and the rear wheel of the motor bicycle are subjected to differentiation control electricity supply, and the content of the differentiation control is to process the model function which is set in advance.