An embodiment of the invention discloses a navigation information processing method, a mobile terminal, an application server and a system. When a same-vehicle invitation function button in a same-vehicle invitation interface of a navigation application of a mobile terminal is selected, a same-vehicle invitation instruction is sent to an application server; the same-vehicle invitation instruction is used to indicate the application server to send a same-vehicle request to at least one target mobile terminal corresponding to a user ID; a same-vehicle confirmation message with user ID is displayed in a same-vehicle group chat window; and a navigation route with a position of the target mobile terminal as the destination is received, and the navigation route is shown on a map application interface in the navigation application. The embodiment of the invention helps to expand the functions of mobile terminal navigation application and enhance the usage viscosity of users.