A route information conversion system comprising: a route information transmission apparatus ; and a route information reception apparatus , wherein the route information transmission apparatus comprises: a route search unit that generates a search result of a route with reference to first map data ; a position reference information generation unit that generates position reference information indicating a road corresponding to the search result; a peripheral road information generation unit that generates peripheral road information indicating a road branching from the road corresponding to the search result and being a road not included in the search result; and a communication unit that transmits the position reference information and the peripheral road information to the route information reception apparatus, and the route information reception apparatus comprises: a communication unit that receives the position reference information and the peripheral road information from the route information transmission apparatus; a route information restoration unit that restores route information on second map data from the position reference information; and a route match determination unit that determines whether the search result on the first map data and the route information on the second map data match each other with reference to the peripheral road information. a route information transmission apparatus ; and a route information reception apparatus , wherein the route information transmission apparatus comprises: a route search unit that generates a search result of a route with reference to first map data ; a position reference information generation unit that generates position reference information indicating a road corresponding to the search result; a peripheral road information generation unit that generates peripheral road information indicating a road branching from the road corresponding to the search result and being a road not included in the search result; and a communication unit that transmits the position reference information and the peripheral road information to the route information reception apparatus, and a route search unit that generates a search result of a route with reference to first map data ; a position reference information generation unit that generates position reference information indicating a road corresponding to the search result; a peripheral road information generation unit that generates peripheral road information indicating a road branching from the road corresponding to the search result and being a road not included in the search result; and a communication unit that transmits the position reference information and the peripheral road information to the route information reception apparatus, and the route information reception apparatus comprises: a communication unit that receives the position reference information and the peripheral road information from the route information transmission apparatus; a route information restoration unit that restores route information on second map data from the position reference information; and a route match determination unit that determines whether the search result on the first map data and the route information on the second map data match each other with reference to the peripheral road information. a communication unit that receives the position reference information and the peripheral road information from the route information transmission apparatus; a route information restoration unit that restores route information on second map data from the position reference information; and a route match determination unit that determines whether the search result on the first map data and the route information on the second map data match each other with reference to the peripheral road information. <EOS>