The invention discloses a rhythm predicting method and a system wherein the method comprises: creating a text rhythm model in advance; gathering text data with corresponding voice data; based on the rhythm information of the voice data, performing automatic rhythm marking to the corresponding text data; obtaining the automatically marked text data; using the automatically marked text data to train the text rhythm model; receiving the to-be-predicted text data; then, extracting the text characteristics of the to-be-predicted text data; and finally utilizing the text characteristics and the text rhythm model to perform rhythm predictions to the to-be-predicted text data. According to the method and the system, as the gathered text data all correspond to voice data and the voice data contain the rhythm information in reality, it is possible to perform automatic rhythm marking to the text data. Therefore, with the system and the method, the problem in the prior art can be solved that artificial marking is required for the rhythm edges of all trained text data to train the text rhythm model, which leads to the high human cost and the long consumption of time.