Data fallback method, device and system

An embodiment of the invention discloses a data fallback method, a data fallback device and a data fallback system, which are applied to the field of communication technologies. According to the data fallback method, a transfer amount and a first transfer order number of a first data transfer platform are recorded in information of a data transfer order; an online class platform or a fallback server can extract the transfer amount and the first transfer order number from the information of the corresponding data transfer order when a data fallback process is initiated, and transmits the transfer amount and the first transfer order number to the first data transfer platform through a data fallback request; and the first data transfer platform completes the data fallback operation. Thus, in the data fallback process, a second transfer order number generated by a second data transfer platform does not need to be changed into the first transfer order number manually to complete data fallback, instead, the online