Paperless conference system supports a variety of conference functions, and can realize venue layout, information editing, modification and background customization. Support staff sign-in, tea ordering, graphic display, date display, current time display function, electronic whiteboard, permission setting, meeting information display, meeting content, address book, notice announcement, participants, meeting manuscript uploading and distribution, seat arrangement, handwritten annotation, electronic signature, synchronous browsing, meeting announcement, file permission setting, demonstration mode and VGA output technology, which can realize screen content output and authorization management of any all-in-one terminal. Support asynchronous reading function. Asynchronous reading mode means that the screen content of conference participants can be completely different from that of the host, and they can read different files, freely read different pages, display short messages, hand-written comments, demonstrate computer desktop viewing, Windows computer terminals, and automatically download conference files on the U disk.