the present invention is to provide e-learning services to specific client to the server is different lectures for a method of providing a learning material for multi-channels of different quality, and storing the production of original elements file unit objects constituting a learning material for multi-channel in the original production department, learning material for multi-channel in the file generation unit down-encoding the encoding target comprising at least one of the source element file in the unit object configured for generating and storing a coded file, for a low quality, the file generating a first and a client or the operating system of the second client from the sub- equipment capability and generating and storing a high quality for a structured file, or low-quality for a structured file for, for the steel requested by the terminal information acquiring unit when the first client or the second client is connected to the first client or the second obtaining the client's operating system, and device information related to specifications, if the data generation unit, and a first client connected to the structure of the encoding target, and the other source element file other than the encoding target the high quality for a structured file, high-quality create teaching data for real-time, and the second client is connected cases, structuring the remaining original component files except the encoded target and coded file, for a lower quality above as a structured file for low-quality teaching data for a lower quality in real time generating high quality for steel data generated by the real-time in a data transmission unit sent based on an identification of the first client or sent based teaching data for low-quality produced by the real-time to the identification information of the second client steps can be made, including that. ;
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