1. A method for text filtering, the method comprising: finding a basic keyword of a semantic keyword in a text, the semantic keyword comprising the basic keyword and a logical operator; in an event that a text content matching the basic keyword in the text is found, conducting a semantic match in the found text content, the semantic match comprising matching the found text content with the semantic keyword according to the logical operator of the semantic keyword; and in an event that the semantic match is successful, filtering a matched text context.