An information service system for a vehicle includes: an information obtaining element for obtaining information, which includes classification information for defining an importance level and an urgency level; a plurality of information output elements having various sensory types so that the information output elements inform the information of an user with various sensory types; a user load detector for detecting a physical and mental load of the user; a selector for selecting one or more information output elements according to the classification information; and a controller for controlling to output the information with the one or more information output elements. The selector selects the one or more information output elements based on the physical and mental load and a priority order of the information.