The present application discloses an apparatus and a method for controlling a change of operation state of a cell and a base station including the apparatus. The apparatus includes: a state change determining unit, configured to determine the change of operation state to be performed by the cell to be controlled, the change of operation state comprising change from active state to sleep state; and a sleep mode determining unit, configured to determine a sleep mode for the cell to be controlled so that the cell to be controlled has a different sleep mode from its adjacent cells, when the state change determining unit determines to perform the change of operation state of the cell to be controlled.