1. An in-vehicle application selecting system, comprising: a pick-up device of picking up an image of a vehicle occupant; a plurality of in-vehicle application executing device, each using an image picked up by the pick-up device, to offer a service to the vehicle occupant; a sensor for measuring a state of the whole or part of the vehicle; and a selection device of selecting an in-vehicle application executing device to be operated among the plurality of in-vehicle application executing device, according to an output of the sensor, to operate the selected in-vehicle application executing device.