A method for interconnecting a smart terminal and an in-vehicle terminal, wherein the method comprises: automatically detecting (201, 401), by an in-vehicle terminal, a connectable device, wherein the connectable device comprises: a Wireless Fidelity, WIFI, device, a Universal Serial Bus, USB, device, or a Bluetooth device; connecting, by the in-vehicle terminal when the in-vehicle terminal detects at least one connectable device, to the detected at least one connectable device, wherein the connecting, by the in-vehicle terminal when the in-vehicle terminal detects at least one connectable device, to the detected at least one connectable device is specifically: when the in-vehicle terminal detects that the at least one connectable device comprises the WIFI device that is selected according to a WIFI signal strength, acquiring characteristic parameters of the WIFI device, automatically generating (403, 50321), by the in-vehicle terminal, a WIFI connection instruction according to the characteristic parameters, and wherein the connection instruction has a fixed format; and connecting (202, 404, 50322), by the in-vehicle terminal, to the WIFI device according to the WIFI connection instruction; and displaying (203, 406, 505), by the in-vehicle terminal if connection succeeds, a connectable device successfully connected to the in-vehicle terminal, comprising: if there are multiple connectable devices successfully connected to the in-vehicle terminal, displaying, by the in-vehicle terminal according to preset priorities, a connectable device having a high priority, and wherein the high priority is configured to be set for a device having a WIFI connection manner of the connection manners of USB, WIFI and Bluetooth. automatically detecting (201, 401), by an in-vehicle terminal, a connectable device, wherein the connectable device comprises: a Wireless Fidelity, WIFI, device, a Universal Serial Bus, USB, device, or a Bluetooth device; connecting, by the in-vehicle terminal when the in-vehicle terminal detects at least one connectable device, to the detected at least one connectable device, wherein the connecting, by the in-vehicle terminal when the in-vehicle terminal detects at least one connectable device, to the detected at least one connectable device is specifically: when the in-vehicle terminal detects that the at least one connectable device comprises the WIFI device that is selected according to a WIFI signal strength, acquiring characteristic parameters of the WIFI device, automatically generating (403, 50321), by the in-vehicle terminal, a WIFI connection instruction according to the characteristic parameters, and wherein the connection instruction has a fixed format; and connecting (202, 404, 50322), by the in-vehicle terminal, to the WIFI device according to the WIFI connection instruction; and when the in-vehicle terminal detects that the at least one connectable device comprises the WIFI device that is selected according to a WIFI signal strength, acquiring characteristic parameters of the WIFI device, automatically generating (403, 50321), by the in-vehicle terminal, a WIFI connection instruction according to the characteristic parameters, and wherein the connection instruction has a fixed format; and connecting (202, 404, 50322), by the in-vehicle terminal, to the WIFI device according to the WIFI connection instruction; and displaying (203, 406, 505), by the in-vehicle terminal if connection succeeds, a connectable device successfully connected to the in-vehicle terminal, comprising: if there are multiple connectable devices successfully connected to the in-vehicle terminal, displaying, by the in-vehicle terminal according to preset priorities, a connectable device having a high priority, and wherein the high priority is configured to be set for a device having a WIFI connection manner of the connection manners of USB, WIFI and Bluetooth.