The invention provides a
parking space reservation method, a vehicle-mounted unit and a back-end
server. The
parking space reservation method comprises the following steps that: a vehicle-mounted unittransmits a parking request to a background
server; the background
server searches a
parking space information
list and sends the parking space information
list to the vehicle-mounted unit; a selected parking space is obtained according to user operation, and appointment requesting is performed through the background server; if reservation succeeds, a navigation
route is planned according to
parking lot information; and if the reservation fails, the parking space information of unoccupied parking spaces is updated or the parking space information
list is re-searched, and reservation is performed. According to the parking space reservation method, a user can select a parking space according to the parking space information list and reserves the parking space through the background server;and after the reservation of the parking space succeeds, the position of a
parking lot where the selected parking space is located serves as a navigation destination, and the vehicle is guided to thenavigation destination; and after the reservation of the parking space succeeds, and before the vehicle of the user reaches the
parking lot, the selected parking space can be changed through parking space adjustment operation, an optimal idle parking space can be recommended to the user, and a navigation
route is recalculated; and therefore, the travel of the user can be facilitated, and cost is reduced.