A long-distance video interaction 
system and method comprise a user end, a 
server end and a 
signal transmission module, wherein the user end is arranged in an offline mobile isolation space; the userterminal comprises a video interaction module and an audio-video hardware decoding module. The 
server end comprises a data storage module, an on-line evaluation and analysis module, a user portrait generation module, a user matching module, a virtual interactive space generation module and an analog / 
digital signal conversion module. The 
signal transmission module encrypts the message, and encryptsthe message content from 
client to 
client. The above 
system and method can be used for distance 
online teaching, the invention overcomes the poor convenience of the remote 
interaction mode, the invention has the disadvantages of low security of 
video transmission, low automatic matching between users, poor user experience and single function of off-line 
mobile interaction space, and realizes thehigh convenience of long-distance interaction, safe transmission of information and intelligent matching of users, and improves the user experience, so as to efficiently utilize off-line mobile mini-space equipment.