An integrated guidance system of a vehicle, may include a sensor configured to collect vehicle information of the vehicle; a lamp configured to selectively light a point including a door or a seat in an internal space of the vehicle when emitting the light; a projector configured to display guidance information on a projection surface of the internal space of the vehicle; and a controller connected to the sensor, the lamp and the projector and configured to control whether the lamp emits the light and the lighting point according to the vehicle information, generate the guidance information for guiding a passenger of the vehicle, and provide the guidance information to the projector, and a method for controlling the same.