The invention discloses a door/window transmission system. The door/window transmission system comprises a handling system and an angle transmission system. The handling system comprises a handling handle, a handling body and a handling base; and the angle transmission system comprises a transmission strip and an angle transmission machine. The door/window transmission system performs the hidden rail operation in the leaf opening process to guarantee the appearance attractiveness, is flexible in opening of the ventilation area, and can open the upper parts of window sashes to achieve an innerreverse micro ventilation effect.