Traditional image captioning methods use only the visual and semantic information of the current moment to generate prediction words without considering the visual and semantic information of the past moments， which leads to the output of the model to be relatively homogeneous in terms of temporal dimension. As a result， the generated captioning is lacking in terms of accuracy. To address this problem， an image captioning method that fuses multi-temporal dimensional visual and semantic information is proposed， which effectively fuses visual and semantic information of past moments and designs a gating mechanism to dynamically select both kinds of information. Experimental validation on the MSCOCO dataset shows that the method is able to generate captioning more accurately， and the performance is considerably improved in all evaluation metrics when compared with the most current state-of-the-art image captioning methods.