Short message intercepting method and system

The invention relates to a short message intercepting method, comprising the steps of: receiving a short message; comparing the content of the short message with the content of a spam message in an interception database; judging whether the similarity of the content of the short message and the content of the spam message is more than a threshold value; if the similarity is more than the threshold value, the short message is intercepted. In the short message intercepting method, the content of the short message and the spam message in the database are compared to determine whether to perform interception according to the similarity of the content of the short message and the content of the spam message, and the spam message can be still recognized according to the change condition of a number of a sender; and the misjudgment possibility is reduced and the spam message can be effectively intercepted. Besides, the invention also provides a short message intercepting system.