In accordance with various embodiments of the disclosed subject matter, a method and an apparatus for checking and updating data on a client terminal are provided. In some embodiments, the method comprises: obtaining a presentation time interval between two adjacent presenting actions of target data on the client terminal, and obtaining an update time interval between two adjacent updating actions of the target data on a server; calculating a weighted mean value of the target data based on the presentation time interval and the update time interval, as well as a preset presentation weight and a preset update weight; and determining an update check period of the client terminal for periodically performing an update operation to the target data based on the weighted mean value.