The invention relates to the technical field of streaming media control, and specifically discloses a fast transmission and synchronization conference audio-visual system applied to C / S computer architecture, the C / S computer architecture comprises a same-screen initiation terminal, a streaming media forwarding server and at least one same-screen receiving terminal, and the conference audio-visualsystem comprises a collection module, an encoding module, a network stream push module, a timestamp check module, a check cycle timing module, at least one receiving end decoding module, at least onereceiving end video and audio synchronization processing module, and at least one receiving end rendering processing module. The invention further discloses a control method of the fast transmissionand synchronization conference audio-visual system, comprising S1-S5: S1, information collection of the encoding module; S2, encoding processing; S3, timestamp marking; S4, decoding processing; and S5, rendering display and rendering playing. By adoption of the fast transmission and synchronization conference audio-visual system provided by the invention, the video transmission rate and the smoothness of video playing are improved, and the video and audio playing is more synchronous.