The present invention relates to a real-time video conference system for real estate auction joint investment. A real-time video conference for real estate auction joint investment according to the present invention includes : a video conference server for hosting a video conference among a main studio, a site of a real estate target offering for auction investment and at least one sub-studio; a main studio system for obtaining image and voice of expert explanation and conference between head quarter investor members for the real estate target offering for auction investment in the main studio in real time and transmitting the image and voice to the video conference server, and outputting video conference image received from the video conference server on a display device; a sub-studio system for receiving a video conference image from the video conference server in real time, outputting on a sub-studio display device, obtaining image and voice of the sub-studio in which the presentation, questions and answers for the real estate offering of a branch investor member in real time and transmitting the image and voice to the video conference server; a real estate site coverage terminal for transmitting a site image of the real estate offering for auction investment to the server and performing on-the-spot coverage; and a contract conclusion unit for making a contract for auction investment between auction investors possible by receiving if the investment of the real estate for auction investment is done or not and investment amount on the web from investor members who are participants of the video conference. [Reference numerals] (100) Main studio system; (200, BB) Sub-studio system; (300, AA) On-the-spot coverage terminal; (400) Internet; (500) Video conference server; (501) Mobile interoperated relay; (510) Video conference management unit; (511) Conference notification unit; (512) Entry management unit; (513) Conference organization assistance unit; (520) Data reception unit; (530) Storage unit; (540) Web call unit; (550) Contract conclusion; (560) Material distribution unit