A traffic condition data providing method using a wireless communication device and a navigation device performing the method are disclosed. The navigation device includes a travelling path displaying unit that searches a travelling path to a destination set by a user and displays the travelling path on map data, a traffic condition data receiving unit that receives traffic condition data from a content managing server through a wireless communication device in response to a request of providing the traffic condition data over the travelling path, and a traffic condition data providing unit that provides the user with the received traffic condition data.