An inter-vehicle message disseminating method in which every vehicle carries a blue-tooth device (or 802.11 device) to actively login to or to passively accept a login from the respective blue-tooth device (or 802.11 devices) of other vehicles with a common authorization key to make a wireless connection for mutual transmitting message. When a message provided to one first vehicle, the first vehicle transmits the message to a number of second vehicles through the respective blue-tooth device, and then the second vehicles again transmit the message with their respective blue-tooth devices to another third vehicles. To transmit the message generation to generation repeatedly within these vehicles, forming a virus infectious frame to wirelessly disseminate kinds of message of update, advertising/promoting, searching, rescuing, socializing information to everywhere without geographic limitations.