The invention discloses a tourism route planning method  which comprises steps: 1  parameters are initialized  a grid map of a known environment is built  and a cost matrix of obstruction information is built  2  information elements are updated  as for each feasible path  the path length and a corresponding information element increment are calculated respectively  and an information element of corresponding each point on the path is updated  3  a path is selected  exploring ants are added  and a generated feasible path can be effectively selected  4  according to an ant path generated at the next moment  a feasible path is generated  and 5  if a search time upper limit is not reached  the second step is returned  or otherwise  the optimal solution is outputted