Provided are a cell selection or access method performed by an aerial user terminal, an aerial user terminal, a neighbor relationship table maintaining method performed by a base station, and a base station. The cell selection or access method includes: receiving, from a base station, indication information for indicating support capability of at least one cell for aerial user terminals; and according to the indication information, selectively performing cell selection or access for one cell of the at least one cell. The maintaining method includes: receiving indication information indicating neighbor cells reported by a user terminal; and maintaining, according to whether the user terminal is an aerial user terminal, a neighbor relationship table selectively according to the indication information.