1. A reminder setting method, comprising: at a computing device having one or more processors, a microphone, a display and memory for storing one or more programs to be executed by the one or more processors: acquiring a speech signal using the microphone; extracting, from the speech signal, a plurality of speech segments; applying the plurality of speech segments to a predefined keyword search network including foreground models and background models, each foreground model configured to recognize a time-specific keyword from a language and each background model configured to a non-time-specific keyword from the language; acquiring time information in the speech signal when one or more of the plurality of speech segments are identified by the predefined keyword search network as containing a time-specific keyword associated with one of the foreground models, the time information including the time-specific keyword, and start and end times of the identified speech segments in the speech signal, and determining a reminder time for reminder setting according to the time information; acquiring a text sequence corresponding to the speech signal by using continuous speech recognition, and determining reminder content for reminder setting according to the time information and the text sequence; setting a reminder according to the reminder time and the reminder content; and displaying, on the display, the reminder including the reminder time, the reminder content and an option to replay the speech signal.