File transfer method, device and system between calculation device and mobile device

The invention discloses a file transfer method, a file transfer device and a file transfer system between a calculation device and a mobile device. An application platform receives a file transfer request message sent by a first terminal; the file transfer request message comprises a file to be transferred and an identification of a second terminal receiving the file; according to the identification of the first terminal sending the file transfer request message and the identification of the second terminal receiving the file, if the condition that the incidence relation is established between the first terminal and the second terminal is determined, the file is sent to the second terminal to which the identification of the second terminal points; the file transfer between different terminals is performed without synchronous operation such as a data line, Bluetooth pairing or a network disk, the incidence relation is established between the first terminal and the second terminal at the application platform, the file transfer between the first terminal and the second terminal which have the incidence relation is realized by the application platform, the operation of users is facilitated, and the information sharing of the different terminals, the transfer efficiency and the user experience are improved.