An information acquisition system includes: a mobile terminal; and an information search system. The information search system searches for information on a route based on route information input from the mobile terminal and transmits a search result to the mobile terminal, and the mobile terminal includes a navigation unit that navigates the route from a departure point to a destination. The information search system includes: a database in which information on the route is stored in correspondence with the route information; and an information search server that searches for the information on the route from the database based on the route information and acquires reservation information for transportation on the route based on the information on the route from a reservation system of the transportation, and the information search server transmits the reservation information to the mobile terminal together with the information on the route.