The invention provides paperless conference system and method based on internal working automation. A conference server device, a number of conference end devices, a number of customer service end devices, a number of secretary end devices, a number of electronic table card devices and a number of image acquiring and outputting devices. The conference server device provides data encryption storing, interactive processing and interface on screen outputting. Each conference end devices provides the functions of attendance, voting, questionnaire, conference data viewing, video synchronization and call service. Each customer service end device responds to the service call of a participant. Each secretary end device is provided with conference type, data inputting, control video connection, statistical statement checking and conference hall music controlling. Each electronic table card device displays the participant name, and has the functions of conference data querying, call service and desktop OA connection. Each image acquiring and outputting device provides high definition video inputting and projection outputting. The system and the method realize full range conference document processing, and have the characteristics of high security, simplified steps and high efficiency.