FACILITY SEARCH SYSTEM, FACILITY SEARCH PROGRAM PRODUCT, AND IN-VEHICLE DEVICE

A facility search system includes a mobile communication terminal communicably connected with a server and independently performing a registration process to register a facility visited by a user as a visited facility in the server and an in-vehicle device provided in a vehicle and communicably connected with the mobile communication terminal and performing the registration process in cooperation with the mobile communication terminal. The server provides a visited-facility registration service in which the facility visited by the user is registered as the visited facility. The in-vehicle device acquires a device position indicating a current position of the vehicle, compares the device position with a preliminarily set destination facility position to determine whether the vehicle arrives at the destination facility, and controls the mobile communication terminal to register the destination facility as the visited facility in the server when determining that the vehicle arrives at the destination facility.