A method for exchanging information relating at least partially to vehicle status data between vehicle-mounted terminals (1000, 2000) mounted in different vehicles, comprising: sending (S101; S201), by a first vehicle-mounted terminal, a broadcast message, wherein the broadcast message carries an identifier of the first vehicle-mounted terminal; establishing, by the first vehicle-mounted terminal, a first relationship with at least one second vehicle-mounted terminal that receives the broadcast message; establishing, by the first vehicle-mounted terminal, a second relationship with at least one third vehicle-mounted terminal; separately exchanging, by the first vehicle-mounted terminal, information with the at least one second vehicle-mounted terminal and the at least one third vehicle-mounted terminal; and recording, by the first vehicle-mounted terminal in a relational database respectively according to an identifier of the at least one second vehicle-mounted terminal and an identifier of the at least one third vehicle-mounted terminal, a quantity of times of establishing the first relationship with the at least one second vehicle-mounted terminal in a valid time period, and a quantity of times of establishing the second relationship with the at least one third vehicle-mounted terminal in the valid time period, and recording the information exchanged with the at least one second vehicle-mounted terminal or third vehicle-mounted terminal, wherein it is determined to establish a second relationship with one of the at least one second vehicle-mounted terminals when the quantity of times of establishing the first relationship is greater than a threshold; and wherein the exchanging, by the first vehicle-mounted terminal, information with the at least one second vehicle-mounted terminal and the at least one third vehicle-mounted terminal separately is specifically: exchanging, by the first vehicle-mounted terminal, first type information when a first relationship is established and second type of information when a second relationship is established, wherein the first type information comprises only non-privacy information, and the first relationship is an encounter relationship; and the second type information comprises privacy information and non-privacy information, and the second relationship is a friend relationship. sending (S101; S201), by a first vehicle-mounted terminal, a broadcast message, wherein the broadcast message carries an identifier of the first vehicle-mounted terminal; establishing, by the first vehicle-mounted terminal, a first relationship with at least one second vehicle-mounted terminal that receives the broadcast message; establishing, by the first vehicle-mounted terminal, a second relationship with at least one third vehicle-mounted terminal; separately exchanging, by the first vehicle-mounted terminal, information with the at least one second vehicle-mounted terminal and the at least one third vehicle-mounted terminal; and recording, by the first vehicle-mounted terminal in a relational database respectively according to an identifier of the at least one second vehicle-mounted terminal and an identifier of the at least one third vehicle-mounted terminal, a quantity of times of establishing the first relationship with the at least one second vehicle-mounted terminal in a valid time period, and a quantity of times of establishing the second relationship with the at least one third vehicle-mounted terminal in the valid time period, and recording the information exchanged with the at least one second vehicle-mounted terminal or third vehicle-mounted terminal, wherein it is determined to establish a second relationship with one of the at least one second vehicle-mounted terminals when the quantity of times of establishing the first relationship is greater than a threshold; and wherein the exchanging, by the first vehicle-mounted terminal, information with the at least one second vehicle-mounted terminal and the at least one third vehicle-mounted terminal separately is specifically: exchanging, by the first vehicle-mounted terminal, first type information when a first relationship is established and second type of information when a second relationship is established, wherein the first type information comprises only non-privacy information, and the first relationship is an encounter relationship; and the second type information comprises privacy information and non-privacy information, and the second relationship is a friend relationship. exchanging, by the first vehicle-mounted terminal, first type information when a first relationship is established and second type of information when a second relationship is established, wherein the first type information comprises only non-privacy information, and the first relationship is an encounter relationship; and the second type information comprises privacy information and non-privacy information, and the second relationship is a friend relationship.