File transmission method and system thereof

The invention discloses a file transmission method which includes the following steps. Firstly, one set of main control equipment and multiple sets of controlled equipment are connected wirelessly. Secondly, touch operation on the main control equipment and each controlled equipment by a user is detected in real time. When sliding touch operation from the main control equipment to each controlled equipment is performed, a positional direction, relative to the main control equipment, of each controlled equipment is obtained based on the touch ending position on the main control equipment and the touch initial position on each controlled equipment by the user. Thirdly, when the user selects files in the main control equipment and carries out sliding touch operation from the main control equipment to any of the controlled equipment, the files that the user selects are transmitted to the controlled equipment based on the positional direction, relative to the main control equipment of the controlled equipment. Acc