Safe monitoring technique for moving k-nearest queries in road network

The present invention relates to a method for calculating moving k-nearest query results and safe exit points in a road network and, more specifically, to a method and a device for providing k-nearest query results, safe zones, and safe exit points by receiving a request of a client terminal. The present invention can protect location information of a query user by: processing a query in a server, and receiving a query request and the location information of the query user from a LBS; transferring the query request to the server by anonymizing the location information of the query user; and receiving a query result corresponding to the anonymized location information of the query user from the server so as to transfer the received query result to the query user.