There is provided an Internet lesson system, in which even if training person and the adviser are respectively in the remote place, lessons of motions of sports, performance or action, etc. can easily be performed through the Internet. In the Internet lesson, there is two screen tool on WEB, the system is downloaded from the Internet when necessary at any time, the adviser inputs the line tool and the voice onto two screens from backward, forward the and side and transmits, and animation with line tool and voice to PC or cellular phone of training person.