Provided are a control method for collaborative input between a vehicle-mounted terminal and a mobile terminal and the mobile terminal. The method comprises the following steps: providing a first collaborative input interface and receiving first information inputted by a user on the first collaborative input interface; transmitting first content change request message to a mobile terminal, the first content change request message comprising first information; receiving a first content change response message returned by the mobile terminal, the first content change response message comprising a first suggested result generated by the mobile terminal on the basis of the first information; and displaying the first suggested result. The method of the present invention greatly increases the user experience on an Internet of Vehicles product in vehicle-mounted terminal input and increases the degree of smoothness of a voice or counter control input mode.