A method for temporal motion information prediction is provided. The method is applied to a decoder and includes the following. Whether non-adjacent position-based temporal motion information prediction is allowed to be used for a current block is determined according to a first flag. Based on a determination that the non-adjacent position-based temporal motion information prediction is allowed to be used, at least one non-adjacent position of the current block is determined, and first temporal motion information of the current block is determined according to motion information of the at least one non-adjacent position in a coded picture. The first flag includes any one or more of: a first sequence-level flag, a first picture-level flag, or a first slice-level flag.